Exhibit  32.2


                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
                       AS ADOPTED PURSUANT TO SECTION 906
                        OF THE SARBANES-OXLEY ACT OF 2002


In  connection  with the Quarterly Report of APA Optics, Inc. (the "Company") on
Form  10-Q for the period ending June 30, 2003, as filed with the Securities and
Exchange Commission on the date hereof (the "Report"), I, David R. Peters, Chief
Financial  Officer  of the Company, certify, pursuant to 18 U.S.C. Sec. 1350, as
adopted  pursuant  to  Sec.  906  of  the  Sarbanes-Oxley  Act  of  2002,  that:

1.   The  Report fully complies with the requirements of Sections 13(a) or 15(d)
     of  the  Securities  Exchange  Act  of  1934;  and

2.   The  information contained in the Report fairly represents, in all material
     respects, the financial condition and results of operations of the Company.

Signature:  /s/  David  R.  Peters
            ----------------------
Print  Name:  David  R.  Peters
              -----------------
Print  Title:  Chief  Financial  Officer
               -------------------------


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