Exhibit 31.2

CERTIFICATION PURSUANT TO

FORM OF RULE 13a-14(a)

AS ADOPTED PURSUANT TO

SECTION
302(a) OF THE SARBANES-OXLEY ACT OF 2002

I, Fernando Sanchez, certify that:

1. I have reviewed this annual report on Form 10-K of ArthroCare Corporation;

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 annual report;

3. Based on my knowledge, the financial statements, and other financial information included in this annual 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 annual report;

4. The registrants other certifying officer and I am
responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(c) 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 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) 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 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

d) 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 officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrants independent registered public
accounting firm and the audit committee of registrants board of directors:

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 data; and

b) Any fraud, whether or not material over financial reporting, that involves management or other employees who have a significant role in the
registrants internal control.



|                     |  |  |  |     |  |                      |  |                                                  
|-------------------- |  |  |  | --- |  | -------------------- |  | -------------------------------------------------
|                     |  |  | 
|Date: March 24, 2006 |  |  |  | By: |  | /s/ Fernando Sanchez
|                     |  |  |  |     |  |                      |  | Fernando Sanchez                                 
|                     |  |  |  |     |  |                      |  | Senior Vice President and Chief Financial Officer