Exhibit 99.1350CERT

         Certification Pursuant to Section 906 of the Sarbanes Oxley Act

      I, Terry K. Glenn, President of CMA Michigan Municipal Money Fund of CMA
      Multi-State Municipal Series Trust (the "Fund"), certify that:

            1.    The N-CSR of the Fund (the "Report") fully complies with the
                  requirements of Section 13(a) or 15(d) of the Securities
                  Exchange Act of 1934; and

            2.    The information contained in the Report fairly presents, in
                  all material respects, the financial condition and results of
                  operations of the Fund.

      Dated: November 21, 2003


                                               /s/ Terry K. Glenn
                                               ------------------
                                               Terry K. Glenn,
                                               President of
                                               CMA Michigan Municipal Money Fund
                                               of CMA Multi-State Municipal
                                               Series Trust

      A signed original of this written statement required by Section 906, or
      other document authenticating, acknowledging, or otherwise adopting the
      signature that appears in typed form within the electronic version of this
      written statement required by Section 906, has been provided to CMA
      Michigan Municipal Money Fund of CMA Multi-State Municipal Series Trust
      and will be retained by CMA Michigan Municipal Money Fund of CMA
      Multi-State Municipal Series Trust and furnished to the Securities and
      Exchange Commission or its staff upon request.



Exhibit 99.1350CERT

         Certification Pursuant to Section 906 of the Sarbanes Oxley Act

      I, Donald C. Burke, Chief Financial Officer of CMA Michigan Municipal
      Money Fund of CMA Multi-State Municipal Series Trust (the "Fund"), certify
      that:

            1.    The N-CSR of the Fund (the "Report") fully complies with the
                  requirements of Section 13(a) or 15(d) of the Securities
                  Exchange Act of 1934; and

            2.    The information contained in the Report fairly presents, in
                  all material respects, the financial condition and results of
                  operations of the Fund.

      Dated: November 21, 2003


                                               /s/ Donald C. Burke
                                               -------------------
                                               Donald C. Burke,
                                               Chief Financial Officer of
                                               CMA Michigan Municipal Money Fund
                                               of CMA Multi-State Municipal
                                               Series Trust

      A signed original of this written statement required by Section 906, or
      other document authenticating, acknowledging, or otherwise adopting the
      signature that appears in typed form within the electronic version of this
      written statement required by Section 906, has been provided to CMA
      Michigan Municipal Money Fund of CMA Multi-State Municipal Series Trust
      and will be retained by CMA Michigan Municipal Money Fund of CMA
      Multi-State Municipal Series Trust and furnished to the Securities and
      Exchange Commission or its staff upon request.