<DOCUMENT>
<TYPE>EX-12.(B)
<SEQUENCE>4
<FILENAME>e18330-ex12b.txt
<DESCRIPTION>ANNUAL CERTIFICATION
<TEXT>
                                                                   Exhibit 12(b)
                              Annual Certifications

      Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

      I, Luis Garcia Limon, certify that:

      1. I have reviewed this annual report on Form 20-F of Grupo Simec, S.A. de
C.V.;

      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 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. The company'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 company 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  company,  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 company'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 company's  internal control
over financial  reporting that occurred  during the period covered by the annual
report that has  materially  affected,  or is  reasonably  likely to  materially
affect, the company's internal control over financial reporting; and

      5. The company's other certifying  officer(s) and I have disclosed,  based
on our 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  weakness 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.

Dated:   July 6, 2004

                                                    /s/ Luis Garcia Limon
                                                        ---------------------
                                                        Luis Garcia Limon
                                                        Chief Executive Officer

</TEXT>
</DOCUMENT>
