<DOCUMENT>
<TYPE>EX-99.1350 CERT
<SEQUENCE>4
<FILENAME>e300305_ex99-1350cert.txt
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906
<TEXT>

Exhibit 99.1350CERT

         Certification Pursuant to Section 906 of the Sarbanes Oxley Act

      I, Terry K. Glenn, President of MuniVest Fund, Inc. (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: April 21, 2003


                                               /s/ Terry K. Glenn
                                               ------------------
                                               Terry K. Glenn,
                                               President of
                                               MuniVest Fund, Inc.

<PAGE>

Exhibit 99.1350CERT

         Certification Pursuant to Section 906 of the Sarbanes Oxley Act

      I, Donald C. Burke, Chief Financial Officer of MuniVest Fund, Inc. (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: April 21, 2003


                                               /s/ Donald C. Burke
                                               -------------------
                                               Donald C. Burke,
                                               Chief Financial Officer of
                                               MuniVest Fund, Inc.

</TEXT>
</DOCUMENT>
