Exhibit 32.1

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 on Form 10-Q of ADDvantage Technologies Group, Inc. (the "Company") for the fiscal quarter ended December 31, 2006, as filed with the Securities and Exchange Commission on the date hereof (the "Report") I, Kenneth A. Chymiak, President and Chief Executive 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: President and Chief Executive Officer

                                                                                     Date: May 15, 2007