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Exhibit 31.2

Certification

I, Todd E. Simpson, certify that:



|1. |  | I have reviewed this quarterly report on Form 10-Q of Targeted Genetics
Corporation;                                                                                                                                                                                                                                    
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|  
|2. |  | Based on my knowledge, this quarterly 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 condensed consolidated financial statements,
and other financial information included in this quarterly 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 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 we 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;
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|
| | 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 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 and I have disclosed, based
on our most recent evaluation, to the registrants auditors and the audit
committee of the registrants board of directors (or persons performing
the equivalent function):
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| | 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
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|
| | 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.                                                                                               

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|October 31, 2003

Date |  | /s/      TODD E. SIMPSON

Todd E. Simpson
Vice President, Finance and Administration, Chief Financial 
Officer, Secretary and Treasurer
(Principal Financial and Accounting Officer)