EXHIBIT 31.2

CERTIFICATION OF 
PRINCIPAL FINANCIAL OFFICER 
PURSUANT TO SECTION 302
OF THE SARBANES-OXLEY ACT OF 2002

I, Michael J. Schuh, certify that:

| | 1. | I have
  reviewed this annual report on Form 10-K of SonoSite, Inc.;                                                                                                                                                                                                                                              
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| | 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;
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| | 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;                   
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| | 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 have:                                                                                 
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| |    | a)                                                                                                                                                                                                                                                                                                                
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| |    | b)                                                                                                                                                                                                                                                                                                                
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| |    | c)                                                                                                                                                                                                                                                                                                                
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| | 5. | The
  registrants other certifying officer 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):           
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| |    | a)                                                                                                                                                                                                                                                                                                                
| |    |                                                                                                                                                                                                                                                                                                                   
| |    | b)                                                                                                                                                                                                                                                                                                                

| | /s/    MICHAEL
  J. SCHUH                                                                      
| | -----------------------------------------------------------------------------------------------
| |                                                                                                
| | Michael J.
  Schuh                                                                             
| | Vice President-Finance, Chief Financial Officer
  and Treasurer
  (Principal Financial Officer)

March 12,
2004

65

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