EXHIBIT 31

                 CERTIFICATE OF THE CHIEF EXECUTIVE OFFICER AND
                         ACTING CHIEF FINANCIAL OFFICER
                     PURSUANT TO 15 U.S.C. 78M(A) OR 78O(D)
                 (SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002)

I, Michael A.  Grollman,  Chairman of the Board of  Directors,  Chief  Executive
Officer and Acting Chief Financial  Officer of National  Scientific  Corporation
hereby certify that:

(1)  I have  reviewed  this annual  report on Form 10-KSB of the Company for the
     fiscal year ended  September  30,  2004;

(2)  Based on my  knowledge,  this  annual  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 annual report;

(3)  Based on my  knowledge,  the  financial  statements,  and  other  financial
     information included in this annual 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 annual report;

(4)  I am responsible for establishing and maintaining  disclosure  controls and
     procedures  (as  defined in Exchange  Act Rules  13a-14 and 15d-14) for the
     Company and I have:

     a.   designed  such  disclosure  controls  and  procedures  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 annual report
          is being prepared;

     b.   evaluated the effectiveness of the Company's  disclosure  controls and
          procedures  as of a date  within 90 days prior to the  filing  date of
          this annual report (the "Evaluation  Date");  and

     c.   presented in this annual report my conclusions about the effectiveness
          of the disclosure controls and procedures based on my evaluation as of
          the Evaluation Date;

(5)  I have  disclosed,  based on my most recent  evaluation,  to the  Company's
     auditors and the audit  committee of the  Company's  board of directors (or
     persons performing the equivalent function):

     a.   all  significant  deficiencies  in the design or operation of internal
          controls which could adversely affect the Company's ability to record,
          process,  summarize and report  financial data and have identified for
          the Company's  auditors any material  weaknesses in internal controls;
          and

     b.   any fraud, whether or not material,  that involves management or other
          employees  who  have a  significant  role  in the  Company's  internal
          controls; and

<PAGE>

(6)  I  have  indicated  in  this  annual  report  whether  or  not  there  were
     significant  changes in internal  controls or in other  factors  that could
     significantly  affect internal  controls  subsequent to the date of my most
     recent  evaluation,   including  any  corrective  actions  with  regard  to
     significant deficiencies and material weaknesses.

IN WITNESS  WHEREOF,  the undersigned has executed this  certificate on the 29th
day of December, 2004.


/s/ Michael A. Grollman
--------------------------------------------
Michael A. Grollman
Chairman, Chief Executive Officer,
and Acting Chief Financial Officer


                                       2