SCHEDULE 14A
                                 (RULE 14a-101)

                     INFORMATION REQUIRED IN PROXY STATEMENT

                            SCHEDULE 14A INFORMATION

                    PROXY STATEMENT PURSUANT TO SECTION 14(a)
                     OF THE SECURITIES EXCHANGE ACT OF 1934



Filed by the Registrant [X]
Filed by a Party other than the
Registrant [ ]

Check the appropriate box:
[ ] Preliminary Proxy Statement           [ ] Confidential, for use of the
                                              Commission Only (as permitted by
                                              Rule 14a-6(e)(2))
[X] Definitive Proxy Statement
[ ] Definitive Additional Materials
[ ] Soliciting Material Under Rule 14a-12

                               PENTON MEDIA, INC.
                (Name of Registrant as Specified In Its Charter)

    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):
       [X] No Fee required.
       [ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and
           0-11.
        (1)   Title of each class of securities to which transaction applies:
        (2)   Aggregate number of securities to which transaction applies:
        (3)   Per unit price or other underlying value of transaction
              computed pursuant to Exchange Act Rule 0-11 (Set forth the
              amount on which the filing fee is calculated and state how it
              was determined):
        (4)   Proposed maximum aggregate value of transaction:
        (5)   Total fee paid:
       [ ]    Fee paid previously with preliminary materials.
       [ ]    Check box if any part of the fee is offset as provided by
              Exchange Act Rule 0-11(a)(2) and identify the filing for which
              the offsetting fee was paid previously. Identify the previous
              filing by registration statement number, or the Form or
              Schedule and the date of its filing.
        (1)   Amount Previously Paid:
        (2)   Form, Schedule or Registration Statement No.:
        (3)   Filing Party:
        (4)   Date Filed:


[LOGO - PENTON]





The Penton Media Building
1300 East Ninth Street
Cleveland, Ohio 44114-1503
(216) 696-7000

-------------------------------
ANNUAL MEETING OF STOCKHOLDERS
TO BE HELD ON MAY 31, 2002
-------------------------------


SUPPLEMENT TO PROXY STATEMENT

                                  INTRODUCTION

         This Supplement to the Proxy Statement, dated April 30, 2002, is being
furnished in connection with the solicitation of proxies by and on behalf of the
Board of Directors for use at the annual meeting of stockholders of Penton
Media, Inc. to be held on Friday, May 31, 2002, at 10:00 a.m., local time, at
the Penton Media Conference Center, 1300 East Ninth Street, Cleveland, Ohio, and
at any adjournment or postponement of the meeting. This Supplement and the
enclosed proxy card are first being mailed on or about May 10, 2002, to the
stockholders of record as of April 8, 2002.

         This Supplement also serves as notice under Delaware law of the
addition of two proposals to the agenda of the 2002 annual meeting of
stockholders, as described below.

         After printing and mailing the Proxy Statement for the 2002 annual
meeting of stockholders, we reached an agreement with our preferred stockholders
to eliminate the scheduled redemption date of the preferred stock to address the
adverse accounting treatment related to this feature of the preferred stock. In
order to amend the terms of the preferred stock, the affirmative vote of the
holders of a majority of our outstanding common and preferred stock, voting
together as a single class, is required. Consequently, the Board of Directors
has determined to add a proposal to the agenda for the 2002 annual meeting of
stockholders to obtain this approval.

         If stockholders do not approve this amendment to the terms of the
preferred stock, we will eliminate the scheduled redemption date by exchanging
the outstanding preferred stock for a new series of preferred stock that will
not have a scheduled redemption date. This exchange would not require
stockholder approval. However, we would need stockholder approval of the
issuance of the common stock upon conversion of this new series of preferred
stock. Consequently, the Board of Directors has determined to add a proposal to
the agenda for the 2002 annual meeting of stockholders to obtain this approval
if stockholders do not approve the amendment to the terms of the preferred
stock.

         If you have not yet returned the proxy card mailed to you with the
Proxy Statement, please disregard that proxy card. If you have already signed
and returned that proxy card, you must return the enclosed blue-striped proxy
card to vote on the proposals discussed in this Supplement. You may vote for
these proposals, as well as the proposals discussed in the Proxy Statement, by
signing, dating and returning the enclosed blue-striped proxy card, which must
be dated after the proxy card you have previously submitted. Only your last
dated proxy card for the annual meeting will count at the meeting. YOUR VOTE IS
IMPORTANT. PLEASE RETURN THE ENCLOSED BLUE-STRIPED PROXY CARD.





                          AMENDMENT TO PROXY STATEMENT

         The Proxy Statement is amended to add the following discussion after
the discussion for Proposal 9:

              PROPOSAL TO ADOPT AN AMENDMENT TO THE CERTIFICATE OF DESIGNATIONS
              RELATING TO PENTON'S SERIES B CONVERTIBLE PREFERRED STOCK TO
              REMOVE SECTION 4C REGARDING THE SCHEDULED REDEMPTION DATE FOR THE
              SERIES B PREFERRED STOCK AND TO MAKE CERTAIN UPDATING AND
              CONFORMING CHANGES (PROPOSAL 10)

              WHAT ARE WE ASKING YOU TO APPROVE?

              You are being asked to adopt an amendment to the Certificate of
              Designations relating to the preferred stock to remove the
              scheduled redemption feature of the preferred stock and to make
              related updating and conforming changes to the Certificate of
              Designations. Section 4C of the Certificate of Designations
              currently provides for the scheduled redemption of the preferred
              stock on March 19, 2012. This proposal to remove this provision
              would be accomplished by deleting Section 4C of the Certificate of
              Designations and making related updating and conforming changes to
              the Certificate of Designations.

              WHY ARE WE SEEKING THIS AMENDMENT?

              As discussed in the section entitled "Do the terms of the
              preferred stock have any accounting implications?" in the General
              Discussion of Proposals 3 Through 7 in the Proxy Statement, there
              are certain adverse accounting implications in calculating our
              earnings per share resulting from the scheduled redemption
              feature.

              First, the amount that must be paid to the preferred stockholders,
              who, by definition, are paid ahead of the common stockholders,
              must be accounted for periodically and reflected on our balance
              sheet as reductions in common stockholders' equity, which will
              adversely affect the calculation of earnings per share available
              to common stockholders.

              By its terms, if any preferred stock remains outstanding on the
              maturity date of March 19, 2012, we will be required to redeem it
              for at least its liquidation value plus accrued dividends. This
              amount is referred to as the liquidation preference. At maturity,
              that amount will be greater than the current liquidation
              preference. For accounting purposes, we must assume that the
              preferred stock will have the maximum liquidation preference at
              maturity. Thus, if we do not receive stockholder approval of
              Proposal 3 and either Proposal 4 or Proposal 5 by the sixth
              anniversary of the issuance of the preferred stock, the
              liquidation value of the preferred stock will increase from $1,000
              to $9,140 per share. In addition, regardless of stockholder
              approval, the dividend rate on the preferred stock will increase
              from 7% to 15% per annum, and the preferred stock could accrue up
              to approximately $383 million of dividends from the sixth
              anniversary until maturity. Thus, at maturity, the 50,000 shares
              of preferred stock could be redeemable for approximately $840
              million. For each reporting period between the date of issuance of
              the preferred stock and the earlier of the date that all of the
              preferred stock is converted or the maturity date, we must
              accrete, using the interest method, a portion of this $840 million
              liquidation preference on our balance sheet as reductions in
              common stockholders' equity. This accretion will negatively affect
              the calculation of earnings per share available to common
              stockholders.

              In addition, the accounting rules require us to calculate earnings
              per share in one of two alternative methods. If either of these
              calculations results in a lower earnings per share calculation
              than this accretion method, we would have to report in our
              financial statements the accounting method that results in the
              lowest earnings per share.

                                       2


              Second, certain features of the preferred stock must be accounted
              for as embedded derivatives, which require mark to market
              accounting, potentially resulting in significant swings in our net
              income and earnings per share.

              By eliminating the scheduled redemption feature, we can eliminate
              these adverse accounting treatments. Even without the scheduled
              redemption feature, however, any accrued dividends on the
              preferred stock would still be reflected as a reduction in
              earnings per share available to common stockholders.

              WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF VOTING FOR PROPOSAL
              10?

              The advantage of approving this proposal is that it will eliminate
              the adverse accounting effect on our earnings per share and common
              stockholders' equity mentioned above. These adverse accounting
              effects could also adversely affect our stock price.

              In consideration for agreeing to this amendment to the terms of
              the preferred stock, which eliminates one of the exit strategies
              of the preferred stockholders, if this Proposal 10 is approved, we
              have agreed to grant the holders of the preferred stock the right
              to require Penton to seek a buyer for substantially all of our
              assets or issued and outstanding capital stock upon the sixth
              anniversary of the issuance of the preferred stock, which is March
              19, 2008. This right, however, would not be effective if less than
              3,500 shares of preferred stock (adjusted for stock splits and
              similar transactions) remain outstanding.

              If we have not received stockholder approval of Proposal 3 and
              either Proposal 4 or Proposal 5 by the sixth anniversary, the
              liquidation value of the preferred stock will increase from $1,000
              to $9,140 per share. If no shares of preferred stock have been
              converted or redeemed by then, the preferred stock will have an
              aggregate liquidation value of $457 million. In addition, even
              before the preferred stockholders are paid, our $332.5 million of
              outstanding bonds must be paid. Thus, at the sixth anniversary, a
              purchaser must be willing to pay more than $789.5 million for the
              company before the common stockholders would be paid.

              By contrast, if stockholders do not approve this amendment, and
              the preferred stockholders must wait until the scheduled
              redemption date to be paid, as discussed above, the maximum
              liquidation preference (the liquidation value of the preferred
              stock plus accrued dividends) would be approximately $840 million.
              By this time, our $332.5 million of outstanding bonds would have
              been paid off or refinanced. Thus, we would have to generate
              approximately $1.17 billion of free cash flow by the scheduled
              redemption date, or sell the company for more than $1.17 billion,
              to pay off the bondholders and the preferred stockholders before
              the common stockholders would be paid.

              ARE THERE ANY ALTERNATIVES TO AMENDING THE TERMS OF THE PREFERRED
              STOCK?

              Yes. We could exchange the outstanding preferred stock for a new
              series of preferred stock that would have all the same terms as
              the current preferred stock except for the scheduled redemption
              right. Pursuant to the authority granted to the Board of Directors
              under our Amended and Restated Certificate of Incorporation, the
              Board of Directors could create this new series of preferred stock
              and effect this exchange without the approval of stockholders. The
              accounting treatment for an exchange, however, would not be as
              favorable as the accounting treatment for an amendment.
              Consequently, the Board of Directors determined to seek this
              amendment.

              Because the accounting treatment for an exchange that eliminates
              the scheduled redemption feature is more favorable than the
              accounting treatment related to retaining the scheduled redemption
              feature, if this Proposal 10 is not approved by stockholders at
              the annual

                                       3


              meeting, we currently intend to effect an exchange to remove
              the scheduled redemption feature.

              WHAT DOES THE BOARD OF DIRECTORS RECOMMEND WITH RESPECT TO
              PROPOSAL 10?

              THE BOARD OF DIRECTORS HAS APPROVED THE ADOPTION OF THIS AMENDMENT
              TO THE CERTIFICATE OF DESIGNATIONS RELATING TO PENTON'S SERIES B
              CONVERTIBLE PREFERRED STOCK TO REMOVE SECTION 4C REGARDING THE
              SCHEDULED REDEMPTION DATE FOR THE PREFERRED STOCK AND MAKE CERTAIN
              UPDATING AND CONFORMING CHANGES. THE BOARD BELIEVES THAT PROPOSAL
              10 IS IN THE BEST INTERESTS OF PENTON AND ITS STOCKHOLDERS AND
              RECOMMENDS THAT YOU VOTE FOR THE APPROVAL OF PROPOSAL 10.

              WHAT VOTE IS REQUIRED TO APPROVE THIS PROPOSAL 10?

              The affirmative vote of the holders of a majority of our
              outstanding stock entitled to vote on this Proposal 10 is required
              to approve this Proposal 10. The holders of both our outstanding
              common stock and preferred stock, voting together as a single
              class, are entitled to vote on this Proposal 10. Under applicable
              Delaware law, in determining whether Proposal 10 has received the
              requisite number of affirmative votes, abstentions and broker
              non-votes will be counted and have the same effect as a vote
              against the proposal.

              In addition, under applicable Delaware law and the Certificate of
              Designation relating to the preferred stock, the holders of the
              preferred stock are entitled to vote separately as a class on
              Proposal 10 because Proposal 10 adversely affects the terms of the
              preferred stock. The terms of the preferred stock require an
              affirmative vote by 75% of the outstanding shares of preferred
              stock to approve this Proposal 10.

              PROPOSAL TO APPROVE THE ISSUANCE OF COMMON STOCK UPON CONVERSION
              OF A NEW SERIES OF PREFERRED STOCK TO BE EXCHANGED FOR THE
              OUTSTANDING PREFERRED STOCK IF PROPOSAL 10 IS NOT APPROVED
              (PROPOSAL 11)

              WHAT ARE WE ASKING YOU TO APPROVE?

              Similar to Proposal 3, we are asking you to approve the issuance
              of our common stock upon conversion of the new series of preferred
              stock that will be issued in exchange for the outstanding
              preferred stock if Proposal 10 is not approved. Stockholder
              approval of Proposal 11 is required to remove the 19.99%
              limitation on this issuance of common stock imposed by the New
              York Stock Exchange listing rules. In addition, stockholder
              approval of Proposal 11 will remove the 19.99% limitation on the
              voting rights of the holders of this new series of preferred
              stock.

              WHY ARE WE SEEKING THIS APPROVAL?

              As discussed above in Proposal 10, there are certain adverse
              accounting implications resulting from the scheduled redemption
              feature of the outstanding preferred stock. By eliminating the
              scheduled redemption feature, we can eliminate these adverse
              accounting treatments. We can accomplish this result either by
              amending the terms of the outstanding preferred stock to remove
              this feature or we can exchange the outstanding preferred stock
              for a new series of preferred stock that has all the same terms as
              the outstanding preferred stock except for the scheduled
              redemption feature. Amending the terms of the outstanding
              preferred stock requires stockholder approval whereas exchanging
              the existing preferred stock for new preferred stock does not
              require stockholder approval. However, amending the terms of the
              existing preferred stock has more favorable accounting treatment
              than would an exchange. Consequently, the Board of Directors has
              determined to seek stockholder approval for an amendment to the
              terms of the preferred stock as contemplated by Proposal 10.

                                       4


              Because the accounting treatment for an exchange is more favorable
              than retaining the scheduled redemption feature, the Board of
              Directors has also approved the exchange if stockholders do not
              approve the amendment. This new series of preferred stock,
              however, would have the same limitations on conversion as the
              existing preferred stock because of the New York Stock Exchange
              listing requirements. See the discussion regarding Proposal 3 in
              the Proxy Statement. Consequently, we need stockholder approval to
              remove this limitation just as we do for the existing preferred
              stock.

              IS THE EFFECTIVENESS OF THIS PROPOSAL CONTINGENT UPON THE APPROVAL
              OF ANOTHER PROPOSAL?

              Yes. If you approve Proposals 3 and 10, we will disregard the
              approval of this Proposal 11. If you do not approve either
              Proposal 3 or 10, but approve this Proposal 11, we will proceed
              with the exchange. If you do not approve any of Proposal 3, 10 or
              11, we will proceed with the exchange. If you approve Proposal 3,
              but do not approve either Proposal 10 or 11, the adverse
              accounting treatments would continue, which could adversely affect
              our stock price, unless we proceed with the exchange, which would
              have the effect of nullifying your approval of Proposal 3 with
              respect to the outstanding preferred stock.

              WHAT ARE THE PRINCIPAL TERMS OF THE NEW SERIES OF PREFERRED STOCK?

              The terms of the new series of preferred stock to be exchanged for
              the existing preferred stock would be exactly identical to the
              terms of the existing preferred stock except that it would not
              have a scheduled redemption date. In consideration for eliminating
              this scheduled redemption date, we would grant to the holders of
              the new series of preferred stock the sales rights discussed in
              Proposal 10. See "What are the advantages and disadvantages of
              voting for Proposal 10" above.

              WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF VOTING FOR
              PROPOSAL 11?

              As discussed in Proposal 3 in the Proxy Statement, the terms of
              the preferred stock are more advantageous to us upon receiving
              stockholder approval of this Proposal 11 (which is similar to
              Proposal 3) and either Proposal 4 or Proposal 5 for the following
              reasons:

              -   The dividend rate on the preferred stock will be fixed at 5%
                  per annum for the first six years rather than the higher
                  dividend rate of 7% per annum payable if stockholder approval
                  is not obtained. The lower dividend rate will result in less
                  cash being used to pay dividends and/or fewer shares of common
                  stock being issued upon conversion of the preferred stock,
                  which will result in less dilution to holders of common stock.

              -   The conversion price of the preferred stock will remain at the
                  higher price and will not be reduced as a result of the
                  failure to receive stockholder approval. A higher conversion
                  price will result in fewer shares of common stock being issued
                  upon conversion of the preferred stock, which will result in
                  less dilution to holders of common stock.

              -   If any preferred stock remains outstanding on March 19, 2008,
                  the liquidation value of the preferred stock will increase
                  only to $4,570 per share rather than $9,140 per share. A lower
                  liquidation value will result in fewer shares of common stock
                  being issued upon conversion of the preferred stock, which
                  will result in less dilution to the holders of common stock.

              -   We may require the holders of preferred stock to convert
                  their preferred stock into common stock provided that certain
                  conditions are met, including receiving stockholder approval
                  of Proposal 11 and either Proposal 4 or Proposal 5. See the
                  discussion entitled "Conversion" in Proposal 3 in the Proxy
                  Statement. This ability to force conversion gives

                                       5


                  us the opportunity, should all of the conditions to forced
                  conversion be met, to reduce the number of shares of preferred
                  stock that would be outstanding on March 19, 2008. This
                  reduction will result in fewer shares of preferred stock
                  having an increased liquidation value as discussed in the
                  immediately preceding bullet point, which will result in less
                  dilution to the holders of common stock.

              -   You will receive more money upon a sale, change in control or
                  liquidation of the company. Upon the happening of any of these
                  events, the holders of the preferred stock are entitled to
                  elect between receiving the liquidation value of their
                  preferred stock plus accrued dividends or having their
                  preferred stock redeemed. A higher liquidation value and a
                  higher dividend rate will result in a larger payment being
                  made to the holders of the preferred stock should they elect
                  to receive the liquidation value plus accrued dividends. If
                  the holders of preferred stock elect to have their preferred
                  stock redeemed, they would be entitled to a payment equal to
                  the number of shares of common stock into which the preferred
                  stock is convertible times the applicable share minimum price.
                  See the discussion entitled "Redemption" in Proposal 3 in the
                  Proxy Statement. A higher liquidation value, a higher dividend
                  rate and a lower conversion price will result in the holders
                  of preferred stock being entitled to convert into a larger
                  number of shares of common stock, which would also result in a
                  higher payment being made to the holders of preferred stock
                  should they elect to have their preferred stock redeemed. In
                  each case, a higher payment being made to the preferred stock
                  holders would result in a lower payment being made to the
                  common stock holders in these events and vice versa.

              If you approve Proposal 11, however, the current 6,378,874 limit
              on (1) the number of shares issuable upon conversion of the
              preferred stock and exercise of the warrants and (2) the number of
              votes to which the holders of preferred are entitled will no
              longer apply. Currently, the holders of preferred stock and
              warrants would be entitled to receive approximately 8,170,302
              shares of common stock upon conversion of the preferred stock and
              exercise of the warrants without this cap. In addition, the
              holders of preferred stock would currently be entitled to
              6,570,302 votes without this cap.

              In addition, voting for this Proposal 11 would have the same
              advantages and disadvantages as voting for Proposal 10.

              WHAT DOES THE BOARD OF DIRECTORS RECOMMEND WITH RESPECT TO
              PROPOSAL 11?

              THE BOARD OF DIRECTORS HAS APPROVED THE ISSUANCE OF THE COMMON
              STOCK UPON CONVERSION OF THE NEW SERIES OF PREFERRED STOCK TO BE
              ISSUED IN EXCHANGE FOR THE OUTSTANDING PREFERRED STOCK IF PROPOSAL
              10 IS NOT APPROVED BY STOCKHOLDERS. THE BOARD BELIEVES THAT
              PROPOSAL 11 IS IN THE BEST INTERESTS OF PENTON AND ITS
              STOCKHOLDERS AND RECOMMENDS THAT YOU VOTE FOR THE APPROVAL OF
              PROPOSAL 11.

              WHAT VOTE IS REQUIRED TO APPROVE THIS PROPOSAL 11?

              The affirmative vote by a majority of the votes cast on this
              Proposal 11 is required to approve this Proposal 11. For this
              purpose, the holders of at least a majority in interest of all our
              outstanding common stock entitled to vote on this Proposal 11 must
              vote on this Proposal 11. The holders of preferred stock are not
              entitled to vote on this Proposal 11.

              Under applicable Delaware law, in determining whether this
              Proposal 11 has received the requisite number of affirmative
              votes, abstentions will be counted in tabulating the votes cast
              and, therefore, will have the same effect as a vote against this
              Proposal 11. Broker non-votes will not be counted in tabulating
              votes cast. Consequently, while broker non-votes do not have the
              effect of a vote against this Proposal 11, they can negatively
              affect the vote on this Proposal 11 if their failure to be counted
              results in less than a majority of all our outstanding common
              stock being voted on this Proposal 11.

                                       6


                            YOUR VOTE IS IMPORTANT!

         PLEASE MARK, SIGN AND DATE THIS PROXY ON THE REVERSE SIDE AND
                RETURN IT PROMPTLY IN THE ACCOMPANYING ENVELOPE.

                                SEE REVERSE SIDE

                              FOLD AND DETACH HERE

--------------------------------------------------------------------------------

                               PENTON MEDIA, INC.
          THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
       FOR THE ANNUAL MEETING OF STOCKHOLDERS TO BE HELD ON MAY 31, 2002

      FOR HOLDERS OF SERIES B CONVERTIBLE PREFERRED STOCK, PAR VALUE $.01

   THOMAS L. KEMP, DANIEL J. RAMELLA and PRESTON L. VICE (each with full power
of substitution) are hereby authorized to vote all the shares of Preferred Stock
which the undersigned would be entitled to vote if personally present at the
annual meeting of stockholders of Penton Media, Inc. to be held on May 31, 2002,
and at any adjournment thereof, as follows on the reverse side and below. The
shares represented by this proxy will be voted as directed, but if no direction
is given, the shares will be voted FOR the election as directors of the named
nominees, FOR each of items 2 and 4-8, inclusive, and item 10, and AGAINST item
9.



                                                                                  WITHHOLD       FOR ALL
                                                                     FOR ALL         ALL         EXCEPT
                                                                                   
 1.  Election of Directors --                                         [ ]           [ ]           [ ]
     Nominees: 01-Daniel C. Budde, 02-Peni A. Garber, 03-Hannah
     C. Stone, 04-R. Douglas Greene
     ------------------------------------------------------------
                (Except nominee(s) written above)




                                                                       FOR         AGAINST       ABSTAIN
                                                                                   
 2.  Approve the appointment of independent accountants for
     fiscal year 2002.                                                [ ]           [ ]           [ ]
 3.  Approve the issuance of common stock upon conversion of
     preferred stock and exercise of warrants.                                Not Applicable
 4.  Approve an amendment to Penton's Restated Certificate of
     Incorporation to increase the number of authorized shares of
     common stock to 155 million if Proposal 3 is approved.           [ ]           [ ]           [ ]
 5.  Approve an amendment to Penton's Restated Certificate of
     Incorporation to increase the number of authorized shares of
     common stock to 435 million if Proposal 3 is not approved.       [ ]           [ ]           [ ]
 6.  Approve an amendment to Penton's Restated Certificate of
     Incorporation to remove the provision limiting the number of
     directors to thirteen.                                           [ ]           [ ]           [ ]


                 (Continued and to be signed on reverse side.)


                              FOLD AND DETACH HERE
 -------------------------------------------------------------------------------
                          (Continued from other side)



                                                                       FOR          AGAINST        ABSTAIN
                                                                                     
 7.  Approve an amendment to Penton's Restated Certificate of
     Incorporation to permit holders of preferred stock to (a)
     call special meetings of the holders of preferred stock and
     (b) act by unanimous written consent.                             [ ]            [ ]            [ ]
 8.  Approve a proposal to permit employees to surrender
     outstanding stock options for new stock options.                  [ ]            [ ]            [ ]
 9.  Approve a proposal by GAMCO Investors, Inc.                       [ ]            [ ]            [ ]
10.  Approve an amendment to the terms of Penton's outstanding
     preferred stock to remove the scheduled redemption date.          [ ]            [ ]            [ ]
11.  Approve the issuance of common stock upon conversion of a
     new series of preferred stock to be exchanged for the
     outstanding preferred stock if Proposal 10 is not approved.                 Not Applicable


                                                  The undersigned acknowledges
                                                  receipt of the Notice of
                                                  Annual Meeting of Stockholders
                                                  and the Proxy Statement.


                                                  Dated                  , 2002
                                                       ------------------

                                                  ------------------------------
                                                  ------------------------------
                                                  ------------------------------
                                                           Signature(s)

                                                  NOTE: Please sign exactly as
                                                        your name appears. Joint
                                                        owners should each sign
                                                        personally. Where
                                                        applicable, indicate
                                                        your official position
                                                        or representative
                                                        capacity.


                            YOUR VOTE IS IMPORTANT!

         PLEASE MARK, SIGN AND DATE THIS PROXY ON THE REVERSE SIDE AND
                RETURN IT PROMPTLY IN THE ACCOMPANYING ENVELOPE.

                                SEE REVERSE SIDE

                              FOLD AND DETACH HERE
--------------------------------------------------------------------------------
                                PENTON MEDIA, INC.

          THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
       FOR THE ANNUAL MEETING OF STOCKHOLDERS TO BE HELD ON MAY 31, 2002

                  FOR HOLDERS OF COMMON STOCK, PAR VALUE $.01

   THOMAS L. KEMP, DANIEL J. RAMELLA and PRESTON L. VICE (each with full power
of substitution) are hereby authorized to vote all the shares of Common Stock
which the undersigned would be entitled to vote if personally present at the
annual meeting of stockholders of Penton Media, Inc. to be held on May 31, 2002,
and at any adjournment thereof, as follows on the reverse side and below. The
shares represented by this proxy will be voted as directed, but if no direction
is given, the shares will be voted FOR the election as director of the named
nominee, FOR each of items 2-8, inclusive, and items 10 and 11, and AGAINST item
9.



                                                                       FOR          WITHHOLD
                                                                                     
 1.  Election of Director -- Nominee: R. Douglas Greene                [ ]            [ ]




                                                                       FOR          AGAINST        ABSTAIN
                                                                                     
 2.  Approve the appointment of independent accountants for
     fiscal year 2002.                                                 [ ]            [ ]            [ ]
 3.  Approve the issuance of common stock upon conversion of
     preferred stock and exercise of warrants.                         [ ]            [ ]            [ ]
 4.  Approve an amendment to Penton's Restated Certificate of
     Incorporation to increase the number of authorized shares of
     common stock to 155 million if Proposal 3 is approved.            [ ]            [ ]            [ ]
 5.  Approve an amendment to Penton's Restated Certificate of
     Incorporation to increase the number of authorized shares of
     common stock to 435 million if Proposal 3 is not approved.        [ ]            [ ]            [ ]
 6.  Approve an amendment to Penton's Restated Certificate of
     Incorporation to remove the provision limiting the number of
     directors to thirteen.                                            [ ]            [ ]            [ ]
 7.  Approve an amendment to Penton's Restated Certificate of
     Incorporation to permit holders of preferred stock to (a)
     call special meetings of the holders of preferred stock and
     (b) act by unanimous written consent.                             [ ]            [ ]            [ ]
 8.  Approve a proposal to permit employees to surrender
     outstanding stock options for new stock options.                  [ ]            [ ]            [ ]


                 (Continued and to be signed on reverse side.)


                              FOLD AND DETACH HERE
-------------------------------------------------------------------------------
                          (Continued from other side)



                                                                       FOR          AGAINST        ABSTAIN
                                                                                     
 9.  Approve a proposal by GAMCO Investors, Inc.                       [ ]            [ ]            [ ]
10.  Approve an amendment to the terms of Penton's outstanding
     preferred stock to remove the scheduled redemption date.          [ ]            [ ]            [ ]
11.  Approve the issuance of common stock upon conversion of a
     new series of preferred stock to be exchanged for the
     outstanding preferred stock if Proposal 10 is not approved.       [ ]            [ ]            [ ]


                                                  The undersigned acknowledges
                                                  receipt of the Notice of
                                                  Annual Meeting of Stockholders
                                                  and the Proxy Statement.


                                                  Dated                   , 2002
                                                       -------------------



                                                  ------------------------------
                                                  ------------------------------
                                                  ------------------------------
                                                           Signature(s)

                                                  NOTE: Please sign exactly as
                                                        your name appears. Joint
                                                        owners should each sign
                                                        personally. Where
                                                        applicable, indicate
                                                        your official position
                                                        or representative
                                                        capacity.