Filed pursuant to Rule 424(b)(3)
                                                       File No. 333-102889

PROSPECTUS SUPPLEMENT NO. 7
(To Prospectus dated May 16, 2003)


                           MAGNA ENTERTAINMENT CORP.

                                  $75,000,000
        7 1/4% Convertible Subordinated Notes due December 15, 2009 and
              Shares of Class A Subordinate Voting Stock Issuable
                       upon the Conversion of the Notes

     This prospectus supplement further supplements the prospectus dated May
16, 2003 of Magna Entertainment Corp., as supplemented on October 14, 2003,
December 5, 2003, January 23, 2004, February 17, 2004, May 6, 2004 and June
18, 2004, relating to the sale from time to time by certain of our
securityholders (including their future pledgees, donees, assignees,
transferees or successors) of up to $75,000,000 aggregate principal amount of
our 7 1/4% Convertible Subordinated Notes due December 15, 2009 and the shares
of Class A Subordinate Voting Stock issuable upon conversion of the notes. You
should read this prospectus supplement in conjunction with the prospectus, and
this prospectus supplement is qualified by reference to the prospectus, except
to the extent that the information in this prospectus supplement supersedes
the information contained in the prospectus.

     The table of selling securityholders contained in the prospectus is
hereby amended to update the information for the following selling
securityholder:



                                                                                Number of Shares
                                                                                   of Class A
                                           Aggregate                              Subordinate
                                        Principal Amount                       Voting Stock That
                                       of Notes That May                       May Be Sold Under     Percentage of
                                         Be Sold Under       Percentage of      this Prospectus          Shares
                Name                    this Prospectus    Notes Outstanding          (1)           Outstanding (2)
        ------------------              ---------------    -----------------    ----------------    ---------------
                                                                                               

  Third Canadian General Investment         $500,000               *                 58,823                *
            Trust Limited
  The Catherine and Maxwell Meighen          $70,000               *                  8,235                *
             Foundation
     New Annan Investments Ltd.              $30,000               *                  3,529                *






*    Less than one percent (1%)

(1)  The number of shares of Class A Subordinate Stock beneficially owned
     and being offered, as set forth in the table, has been determined in
     accordance with Rule 13d-3 under the Securities Exchange Act,
     includes shares of Class A Subordinate Voting Stock into which the
     notes are convertible, and assumes a conversion price of $8.50 per
     share of Class A Subordinate Voting Stock and the payment of cash in
     lieu of fractional shares. In addition, the conversion price of the
     notes may be adjusted under certain circumstances which will change
     the number of shares of Class A Subordinate Voting Stock received
     upon their conversion. See "Description of the Notes - Conversion of
     the Notes" in the prospectus.

(2)  Calculated based on Rule 13d-3(d)(i) of the Securities Exchange Act,
     using 48,674,796 shares of Class A Subordinate Voting Stock
     outstanding as of March 17, 2003. In calculating this percentage for
     each holder, we treated as outstanding the number of shares of Class
     A Subordinate Voting Stock issuable upon the conversion of all that
     holder's notes, but we did not assume conversion of any other
     holders' notes, or include any other shares of Class A Subordinate
     Voting Stock that may be held by such holder. Does not include shares
     of Class A Subordinate Voting Stock that may be issued by us upon
     redemption or purchase of the notes by us at the option of the holder.

     Investing in the notes or shares of our Class A Subordinate Voting Stock
involves risks that are described in the "Risk Factors" section beginning on
page 3 of the prospectus.

NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR PASSED UPON THE
ADEQUACY OR ACCURACY OF THIS PROSPECTUS SUPPLEMENT, AND ANY REPRESENTATION TO
THE CONTRARY IS A CRIMINAL OFFENSE.


          The date of this prospectus supplement is November 4, 2004.