Exhibit 31(a)

                                TXU GAS COMPANY
                      Certificate Pursuant to Section 302
                        of Sarbanes - Oxley Act of 2002
                              CERTIFICATION OF CEO

        I, M.S. Greene, Vice Chairman and Chief Executive of TXU Gas Company,
certify that:

    1.   I have reviewed this quarterly report on Form 10-Q of TXU Gas Company;

    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 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 control 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: May 14, 2004           /s/ M.S. Greene
                             --------------------------------------------------
                             Signature: M.S. Greene
                             Title: Vice Chairman and Chief Executive