UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): January 31, 2006

Mercury Interactive Corporation

(Exact name of registrant as specified in its charter)

Delaware	0-22350	77-0224776
(State or other jurisdiction of incorporation)	(Commission File No.)	(IRS Employer Identification No.)

379 North Whisman Road, Mountain View, California 94043

(Address of Principal Executive Offices)

(Registrant’s Telephone Number, Including Area Code)

(650) 603-5200

(former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Solicitation material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 241.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01 Other Events

On January 31, 2006, Mercury Interactive Corporation (the “Company”) completed its acquisition of privately held Systinet Corporation, a Delaware corporation. A copy of the press release issued by the Company on February 1, 2006 announcing the completion of the above-mentioned transaction is furnished as Exhibit 99.1 to this Current Report.

Item 9.01. Financial Statements and Exhibits.

The following exhibit is furnished herewith:

99.1     Press release dated February 1, 2006

This exhibit is furnished with this Current Report on Form 8–K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, and is not incorporated by reference into any filing of the Company under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date of this report and irrespective of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: February 6, 2006	MERCURY INTERACTIVE CORPORATION
	By:	/s/ David J. Murphy
	Name:	David J. Murphy
	Title:	Chief Financial Officer

EXHIBIT INDEX

Exhibit No.	Description
99.1	Press release dated February 1, 2006