EXHIBIT
  12.1

CHIEF
  EXECUTIVE OFFICER CERTIFICATION

I,
  Frank E. Dangeard, certify that:

1.

I have reviewed this
  amended annual report on Form 20-F/A of Thomson;

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 company as of, and for, the periods presented
  in this report;

4.

The companys
  other certifying officer 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 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)

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 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

d)

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 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 weaknesses 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.



|Date:
        July 24, 2007 |                                             
|--------------------------- | --------------------------------------------
|                            | /s/
      Frank E. Dangeard                 
|                            | Frank
        E. Dangeard                   
|                            | Chairman
        and Chief Executive Officer