CERTIFICATION

            Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

      Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a)
and (b) of section 1350, chapter 63 of title 18, United States Code), each of
the undersigned officers of The Hartford Mutual Funds II, Inc. does hereby
certify, to such officer's knowledge, that:

      The annual report on Form N-CSR of The Hartford Mutual Funds II, Inc. for
      the period ended April 30, 2005 (the "Form N-CSR") fully complies with the
      requirements of Section 13(a) or 15(d) of the Securities Exchange Act of
      1934 and information contained in the Form N-CSR fairly presents, in all
      material respects, the financial condition and results of operations of
      the Fund.

Date: June 15, 2005                           By: /s/David M. Znamierowski
                                                  ------------------------
                                                  David M. Znamierowski
                                                  Its: President

Date: June 15, 2005                           By: /s/Tamara L. Fagely
                                                  ------------------------
                                                  Tamara L. Fagely
                                                  Its: Vice President,
                                                  Controller and Treasurer

A signed original of this written statement required by Section 906 has been
provided to The Hartford Mutual Funds II, Inc. and will be retained by The
Hartford Mutual Funds II, Inc. and furnished to the Securities and Exchange
Commission or its staff upon request.