Exhibit 99.1350CERT


      Certification Pursuant to Rule 30a-2(b) under the 1940 Act and
                   Section 906 of the Sarbanes Oxley Act


Pursuant to 18 U.S.C.  1350, the undersigned officer of BlackRock Mid Cap
Value Opportunities Fund of BlackRock Mid Cap Value Opportunities Series, Inc.
(the "Registrant"), hereby certifies, to the best of his knowledge, that the
Registrant's Report on Form N-CSR for the period ended July 31, 2007, (the
"Report") fully complies with the requirements of Section 15(d) of the
Securities Exchange Act of 1934, as amended, and that the information contained
in the Report fairly presents, in all material respects, the financial
condition and results of operations of the Registrant.


Date: September 20, 2007


/s/ Robert C. Doll, Jr.
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Robert C. Doll, Jr., Chief Executive Officer (principal executive officer) of
BlackRock Mid Cap Value Opportunities Fund of
BlackRock Mid Cap Value Opportunities Series, Inc.


Pursuant to 18 U.S.C.  1350, the undersigned officer of BlackRock Mid Cap
Value Opportunities Fund of BlackRock Mid Cap Value Opportunities Series, Inc.
(the "Registrant"), hereby certifies, to the best of his knowledge, that the
Registrant's Report on Form N-CSR for the period ended July 31, 2007, (the
"Report") fully complies with the requirements of Section 15(d) of the
Securities Exchange Act of 1934, as amended, and that the information contained
in the Report fairly presents, in all material respects, the financial
condition and results of operations of the Registrant.


Date: September 20, 2007


/s/ Donald C. Burke
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Donald C. Burke, Chief Financial Officer (principal financial officer) of
BlackRock Mid Cap Value Opportunities Fund of
BlackRock Mid Cap Value Opportunities Series, Inc.


This certification is being furnished pursuant to Rule 30a-2(b) under the
Investment Company Act of 1940, as amended, and 18 U.S.C. Section 1350 and is
not being filed as part of the Form N-CSR with the Securities and Exchange
Commission.