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, certify that:

(1)  I have reviewed this Quarterly Report on Form 10-QSB of National Scientific
     Corporation;

(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)  The  small  business  issuer'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)) and
     internal control over financial reporting (as defined in Exchange Act Rules
     13a-15(f) and 15d-15(f)) 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)  Designed such internal  control over  financial  reporting,  or caused
          such internal  control over  financial  reporting to be designed under
          our  supervision,   to  provide  reasonable  assurance  regarding  the
          reliability  of financial  reporting and the  preparation of financial
          statements for external purposes in accordance with generally accepted
          accounting principles;

     (c)  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

     (d)  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


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          has materially affected, or is reasonably likely to materially affect,
          the small business issuer's internal control over financial reporting;
          and

(5)  The  small  business  issuer's  other  certifying  officer(s)  and  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 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 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.


/s/ Michael A. Grollman
--------------------------------------------
Michael A. Grollman
Chairman, Chief Executive Officer,
and Acting Chief Financial Officer
March 18, 2005



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