Oppenheimer MONEY MARKET Fund, INC.
                              Supplement dated July 28, 2003 to the
                  Statement of Additional Information dated September 24, 2002

The Statement of Additional Information is changed as follows:

1. The Supplement dated March 31, 2003 is replaced with this supplement.

2. The section captioned "The Fund's Investment Policies" is amended as follows:

a. The first  sentence  of the last  paragraph  under  that  caption  "Rating of
Securities--Portfolio  Quality,  Maturity  and  Diversification"  on  page  2 is
revised to read:

"The  Rating  Organizations   currently   designated  as   nationally-recognized
statistical rating  organizations by the Securities and Exchange  Commission are
Standard & Poor's (a division of the McGraw-Hill  Companies),  Moody's Investors
Service, Inc., Fitch, Inc. and Dominion Bond Rating Service Limited."

b. Add the following at the end of Appendix A:

Dominion Bond Rating Service Limited ("DBRS")
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R-1:  Short term debt rated "R-1 (high)" is of the highest credit  quality,  and
indicates  an entity  which  possesses  unquestioned  ability  to repay  current
liabilities as they fall due.  Entities rated in this category normally maintain
strong liquidity positions,  conservative debt levels and profitability which is
both stable and above  average.  Companies  achieving an "R-1 (high)" rating are
normally  leaders in  structurally  sound  industry  segments  with proven track
records,  sustainable  positive  future  results and no  substantial  qualifying
negative   factors.   Given  the  extremely  tough  definition  which  DBRS  has
established for an "R-1 (high)",  few entities are strong enough to achieve this
rating.  Short term debt rated "R-1 (middle)" is of superior credit quality and,
in most cases, ratings in this category differ from "R-1 (high)" credits to only
a small degree. Given the extremely tough definition which DBRS has for the "R-1
(high)" category (which few companies are able to achieve),  entities rated "R-1
(middle)" are also  considered  strong credits which  typically  exemplify above
average strength in key areas of consideration  for debt protection.  Short term
debt rated "R-1 (low)" is of satisfactory  credit quality.  The overall strength
and outlook for key liquidity,  debt and profitability ratios is not normally as
favorable as with higher rating categories,  but these  considerations are still
respectable.   Any  qualifying  negative  factors  which  exist  are  considered
manageable, and the entity is normally of sufficient size to have some influence
in its industry.

R-2:  Short term debt rated "R-2" is of adequate  credit  quality and within the
three subset grades (high,  middle,  low),  debt  protection  ranges from having
reasonable ability for timely repayment to a level which is considered only just
adequate.  The liquidity and debt ratios of entities in the "R-2" classification
are not as strong as those in the "R-1" category,  and the past and future trend
may suggest some risk of maintaining  the strength of key ratios in these areas.
Alternative sources of liquidity support are considered  satisfactory;  however,
even the  strongest  liquidity  support  will not improve the  commercial  paper
rating of the issuer.  The size of the entity may restrict its flexibility,  and
its  relative  position in the  industry is not  typically as strong as the "R-1
credit".  Profitability trends, past and future, may be less favorable, earnings
not as stable,  and there are often negative  qualifying  factors  present which
could also make the entity more  vulnerable to adverse  changes in financial and
economic conditions.

3. The  section  titled  "How  the Fund is  Managed  - Board  of  Directors  and
Oversight Committees" on page 10 is deleted and replaced with the Following:

"Board of Directors and Oversight Committees. The Fund is governed by a Board of
Directors,  which is responsible  for  protecting the interests of  shareholders
under Massachusetts law. The Directors meet periodically  throughout the year to
oversee the Fund's activities, review its performance, and review the actions of
the Manager.  Although the Fund will not  normally  hold annual  meetings of its
shareholders,  it may hold  shareholder  meetings from time to time on important
matters,  and shareholders  have the right to call a meeting to remove a Trustee
or to take other action described in the Fund's Declaration of Trust.

The Board of Directors has an Audit Committee,  a Study Committee,  a Governance
Committee  and a Proxy  Committee.  The Audit  Committee is comprised  solely of
Independent  Directors.  The  members of the Audit  Committee  are Edward  Regan
(Chairman),  Kenneth Randall and Russell Reynolds. The Audit Committee held five
meetings  during the Fund's fiscal year ended July 31, 2002. The Audit Committee
provides the Board with  recommendations  regarding  the selection of the Fund's
independent  auditor.  The Audit Committee also reviews the scope and results of
audits and the audit fees charged,  reviews reports from the Fund's  independent
auditor concerning the Fund's internal accounting  procedures,  and controls and
reviews  reports of the Manager's  internal  auditor,  among other duties as set
forth in the Committee's charter.

The members of the Study Committee are Robert Galli (Chairman),  Joel Motley and
Phillip  Griffiths.  The Study  Committee held seven meetings  during the Fund's
fiscal year ended July 31, 2002.  The Study  Committee  evaluates and reports to
the Board on the  Fund's  contractual  arrangements,  including  the  Investment
Advisory  and  Distribution   Agreements,   transfer  and  shareholder   service
agreements  and  custodian  agreements  as well as the policies  and  procedures
adopted  by the  Fund to  comply  with  the  Investment  Company  Act and  other
applicable law, among other duties as set forth in the Committee's charter.

The member of the Governance Committee are Elizabeth Moynihan  (Chairman),  Joel
Motley,  Phillip Griffiths and Kenneth Randall. The Governance Committee held no
meeting  during the Fund's  fiscal  year ended  July 31,  2002.  The  Governance
Committee  reviews the Fund's  governance  guidelines and recommends  changes it
deems  appropriate  to the Board,  assesses  the adequacy of the Fund's Codes of
Ethics,  and develops  qualification  criteria for Board members consistent with
the  Fund's  governance  guidelines,   among  other  duties  set  forth  in  the
Committee's charter.

The members of the Proxy Committee are Edward Regan (Chairman), Russell Reynolds
and John Murphy.  The Proxy  Committee  held no meeting during the Fund's fiscal
year  ended  July  31,  2002.  The  Proxy  Committee  provides  the  Board  with
recommendations for proxy voting and monitors proxy voting by the Fund."

4. Effective  December 31, 2002, Mr. Leon Levy retired as a Director of the Fund
and Mr. Clayton Yeutter was elected as Chairman of the Board,  effective January
1, 2003.  Effective March 31, 2003, Mr. Benjamin Lipstein retired as a Director.
Therefore,  the Statement of Additional  Information  is revised by deleting the
biography  for Messrs.  Levy and Lipstein on page 13 and by adding the following
to Mr. Yeutter's biography: "Chairman of the Board of Directors."

5. In the Director  compensation table on page 18, the title of "Chairman" after
Mr.  Levy's  name is  deleted  and the title of  "Chairman"  is added  after Mr.
Yeutter's name. In addition, the following footnote is added following the names
of Messrs. Levy, Lipstein and Yeutter:

      6.  Effective  January 1, 2003,  Mr.  Yeutter  became  Chairman  of the
          Board of Directors of the Board I Funds upon the retirement of Mr.
          Levy.  Effective March 31, 2003, Mr. Lipstein retired as a Director.

6. The  following  is added at the end of the second  paragraph  in the  section
titled "The Investment Advisory Agreement" starting on page 19:

"With the addition of a new breakpoint, effective December 12, 2002, those rates
are  currently  as follows:  0.45% of the first $500  million of  aggregate  net
assets;  0.425% of the next $500  million of net assets;  0.40% of the next $500
million of net assets;  0.375% of the next $1.5 billion of net assets; and 0.35%
of average annual net assets in excess of $3.0 billion."




July 28, 2003                                                  PX200.013