**Rule
        13a-14(a)/15d-14(a) Certification**
   I,
        Peter
        P. Phildius, certify that:
   1.     
        I have reviewed this quarterly report on Form 10-QSB of Avitar,
        Inc.;
   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 registrant as of,
        and
        for, the periods presented in this report;
   4.     
        The registrant’s other certifying officer(s) and I are responsible for
        establishing and maintaining disclosure controls and procedures (as defined
        in
        Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant 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 registrant, 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 registrant’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 registrant’s internal control over
        financial reporting that occurred during the registrant’s most recent fiscal
        quarter (the registrant’s fourth fiscal quarter in the case of an annual report)
        that has materially affected, or is reasonably likely to materially affect,
        the
        registrant’s internal control over financial reporting; and
   5.
             The registrant’s other certifying officer(s) and I
        have disclosed, based on our most recent evaluation of the internal control
        over
        financial reporting, to the registrant’s auditors and the audit committee of the
        registrant’s board of directors (or persons performing the equivalent
        functions):
   a)     
        All significant deficiencies and material weaknesses in the design or operation
        of internal controls over financial reporting which are reasonably likely
        to
        adversely affect the registrant’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 registrant’s internal control over financial
        reporting.
 
 
 Date:  August
        14,
        2007                                                                         /S/
        Peter P.
        Phildius
 Peter
        P. Phildius
 Chairman
        and Chief
 Executive
        Officer
 (Principal Executive Officer)