Exhibit 31.1

                  CERTIFICATION PURSUANT TO SECTION 302 OF THE
                          SARBANES-OXLEY ACT OF 2002

I, Kenneth A. Chymiak, certify that:

1.        I have reviewed this quarterly report on Form 10-Q of ADDvantage
     Technologies Group, Inc, (the "Company");

2.        Based on my knowledge, this report does not contain any untrue
     statement of a material fact or omit to state a material fact necessary to
     make the statements made, in light of the circumstances under which such
     statements were made, not misleading with respect to the period covered by
     this report;

3.        Based on my knowledge, the financial statements, and other financial
     information included in this report, fairly present in all material
     respects the financial condition, results of operations and cash flows of
     the Company as of, and for, the periods presented in this report;

4.        I am responsible for establishing and maintaining disclosure controls
     and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15-(e))
     for the Company and have:

     a)  Designed such disclosure controls and procedures, or caused such
         disclosure controls and procedures to be designed under my
         supervision, to ensure that material information relating to the
         Company, including its consolidated subsidiaries, is made known to me
         by others within those entities, particularly during the period in
         which this report is being prepared;

     b)  Evaluated the effectiveness of the Company's disclosure controls and
         procedures and presented in this report my conclusions about the
         effectiveness of the disclosure controls and procedures, as of the end
         of the period covered by this report based on such evaluation; and

     c)  Disclosed in this report any change in the Company's internal control
         over financial reporting that occurred during the Company's most
         recent fiscal quarter that has materially affected, or is reasonably
         likely to materially affect, the Company's internal control over
         financial reporting; and

5.        I have disclosed, based on my most recent evaluation of internal
     control over financial reporting, to the Company's auditors and the audit
     committee of the Company's board of directors (or persons performing the
     equivalent functions):

     a)  All significant deficiencies and material weaknesses in the design or
         operation of internal control over financial reporting which are
         reasonably likely to adversely affect the Company's ability to record,
         process, summarize and report financial information; and

     b)  Any fraud, whether or not material, that involves management or other
         employees who have a significant role in the Company's internal
         control over financial reporting.



Date: February 10, 2005


                                        By: /s/ Kenneth A. Chymiak
                                        -----------------------------
                                        Kenneth A. Chymiak
                                        Chief Executive Officer and Chief
                                        Financial Officer