BOSTON FINANCIAL QUALIFIED HOUSING TAX CREDITS L.P. IV
                                   (A Limited Partnership)

                                              EXHIBIT 31.1

I, Gary Mentesana, certify that:

1.   I have reviewed this quarterly report on Form 10-QSB of Boston Financial
     Qualified Housing Tax Credits L.P. IV;

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 small business issuer 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 small business issuer and have:

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

     (b) Evaluated the effectiveness of the small business issuer's disclosure
         controls and procedures and presented in this report our 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 small business issuer's
         internal control over financial reporting that occurred during the
         small business issuer's most recent fiscal quarter (the small business
         issuer's fourth fiscal quarter in the case of an annual report) that
         has materially affected, or is reasonably likely to materially affect,
         the small business issuer's internal control over financial reporting;
         and

5.       I have disclosed,  based on our most recent  evaluation of internal
        control over financial  reporting,  to the small business issuer's
        auditors  and the audit  committee  of the small  business  issuer's
        board of  directors  (or  persons  performing  the equivalents
        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 small business issuer'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 small business
         issuer's internal control over financial reporting.


Date:    August 14, 2007                  /s/Gary Mentesana
                                           Gary Mentesana
                                           Principal Executive Officer and
                                           Principal Financial Officer
                                           Arch Street VIII, Inc., as
                                           Managing General Partner of
                                           Boston Financial Qualified
                                           Housing Tax Credits L.P. IV