FORM OF SECTION 906 CERTIFICATION

                                                              EX-99.906CERT MAIL

Michael S. Daubs, President, and Mary E. Hoffmann, Treasurer, of Ultra Series
Fund (the "Registrant"), to the best of their knowledge, each certify that:

1.    The Registrant's periodic report on Form N-CSR for the period ended
      December 31, 2004 (the "Form N-CSR") fully complies with the requirements
      of Section 15(d) of the Securities Exchange Act of 1934, as amended; and

2.    The information contained in the Form N-CSR fairly presents, in all
      material respects, the financial condition and results of operations of
      the Registrant.

PRESIDENT                                         TREASURER

/s/Michael S. Daubs                               /s/Mary E. Hoffmann
- -------------------                               -------------------
Michael S. Daubs                                  Mary E. Hoffmann

Date: February 24, 2005                           Date: February 24, 2005