Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT

TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of ADDvantage Technologies Group, Inc. (the “Company”) for the year ended September 30, 2005, as filed with the Securities and Exchange Commission on the date hereof (the “Report”) I, Kenneth A. Chymiak, the Chief Executive Officer and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

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

	/s/    Kenneth A. Chymiak
Name:	Kenneth A. Chymiak
Title:	Chief Executive Officer and Chief Financial Officer
Date:	December 27, 2005