Exhibit 99.906CERT

                Certification Pursuant to Section 1350 of Chapter
                       63 of Title 18 of the United States
                       Code As Adopted Pursuant to Section
                      906 of the Sarbanes-Oxley Act of 2002


In connection with the Certified Shareholder Report of Principal Growth Fund,
Inc. (the "Registrant") on Form N-CSR (the "Report"), each of the undersigned
officers of the Registrant does hereby certify that, to the best of their
knowledge:
     1)   the Report fully  complies with the  requirements  of Section 13(a) or
          15(d) of the Securities Exchange Act of 1934;

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

By   /s/ Ralph C. Eucher
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     Ralph C. Eucher, President


Date 6/17/2005
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By   /s/ Jill R. Brown
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     Jill R. Brown, Vice President and Chief Financial Officer

Date 6/17/2005
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    This certification is being furnished to the Commission solely pursuant
   to 18 U.S.C. Section 1350 and is not being filed as part of the Form N-CSR
                           filed with the Commission.