Pricing Supplement No. 29 dated April 28, 2004
(to Prospectus dated August 6, 2003
and Prospectus Supplement dated August 6, 2003)		   Filed under Rule 424(b)(3)
File No. 333-107132

SLM Corporation
Medium Term Notes, Series A
Due 9 Months or Longer From the Date of Issue


Principal Amount:
$1,000,000,000
 
Floating Rate Notes:
o
 
Fixed Rate Notes:
ý

Original Issue Date:
May 5, 2004
 
Closing Date: May 5, 2004
 
CUSIP Number:
78442F CJ5

Maturity Date:
May 15, 2014
 
Option to Extend Maturity:
ý No
 
Specified Currency:
U.S. Dollars
      If Yes, Final Maturity Date: o Yes      
Redeemable at the option of the Company:   ý    No   Redemption Price: Not Applicable.
    o    Yes   Redemption Dates: Not Applicable.
Repayment at the option of the Holder:   ý    No   Repayment Price: Not Applicable.
    o    Yes   Repayment Dates: Not Applicable.
Applicable to Fixed Rate Notes Only:
Interest Rate: 5.375%   Interest Payment Dates: Each May 15th and November 15thduring the term of the Notes, beginning November 15, 2004, subject to adjustment in accordance with the following business day convention.
Interest Accrual Method: 30/360   Interest Periods: From and including the Closing Date, or the previous May 15th or November15th, as the case may be, to and including the next succeeding May 14th or November 14th, as the case may be, with no adjustment to period end dates for accrual purposes.

Citigroup
 
JPMorgan
 
Morgan Stanley

Joint Book-Running Managers


Banc of America Securities LLC
Credit Suisse First Boston
Scotia Capital
 
Barclays Capital
Goldman, Sachs & Co.
Wachovia Securities

Co-Managers

April 28, 2004

Form: Book-entry.

Denominations:
$1,000 minimum and integral multiples of $1,000 in excess thereof.

Trustee:
JPMorgan Chase Bank, formerly known as The Chase Manhattan Bank.

Agents:
The following agents are acting as underwriters in connection with this issuance.

 
                                Agents
 
Principal Amount of Notes

 
        J.P. Morgan Securities Inc.
 
$   266,668,000.00    
          Citigroup Global Markets Inc.   266,667,000.00    
          Morgan Stanley & Co. Incorporated   266,667,000.00    
          Banc of America Securities LLC   33,333,000.00    
          Barclays Capital Inc.   33,333,000.00    
          Credit Suisse First Boston LLC   33,333,000.00    
          Goldman, Sachs & Co.   33,333,000.00    
          Scotia Capital (USA) Inc.   33,333,000.00    
          Wachovia Capital Markets, LLC        33,333,000.00    
                  Total   $1,000,000,000.00    

Issue Price:
99.776%.

Agents' Commission:
0.450%.

Net Proceeds:
$993,260,000.

Concession:
0.300%.

Reallowance:
0.125%.

CUSIP Number:
78442F CJ5

ISIN Number:
US78442F CJ57

An affiliate of one of the underwriters has entered into a swap transaction with the issuer in connection with the Notes and may have received compensation in connection with that transaction.

Obligations of SLM Corporation and any subsidiary of SLM Corporation are not guaranteed by the full faith and credit of the United States of America. Neither SLM Corporation nor any subsidiary of SLM Corporation (other than Student Loan Marketing Association) is a government-sponsored enterprise or an instrumentality
of the United States of America.

  

MTN 0074

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