FEDERATED MUNICIPAL SECURITIES FUND, INC.

                            Federated Investors Funds
                              5800 Corporate Drive
                       Pittsburgh, Pennsylvania 15237-7000

                                  June 3, 2005


EDGAR Operations Branch
Securities and Exchange Commission
Division of Investment Management
450 Fifth Street, Northwest
Washington, DC  20549

       RE:    FEDERATED MUNICIPAL SECURITIES FUND, INC. (the "Registrant")
                  Class A Shares
                  Class B Shares
                  Class C Shares
                1933 Act File No. 2-57181
                1940 Act File No. 811-2677

Dear Sir or Madam:

     Pursuant to Rule 497(j) of the Securities Act of 1933, the above-referenced
Registrant hereby certifies that the definitive form of Prospectus and Statement
of Additional  Information  dated May 31, 2005, that would have been filed under
Rule  497(c),  does not differ  from the form of  Prospectus  and  Statement  of
Additional  Information contained in the most recent Registration  Statement for
the Registrant.  This Registration Statement was electronically filed under Rule
485(b) as Post-Effective amendment No. 60 on May 27, 2005.

     If you have any questions regarding this  certification,  please contact me
at (412) 288-8082.

                                                  Very truly yours,



                                                  /s/ George F. Magera
                                                  George F. Magera
                                                  Assistant Secretary