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): August 4, 2004

ACLARA BIOSCIENCES, INC.

(Exact name of registrant as specified in its charter)

Delaware

0-29975

94-3222727

(State or other jurisdiction

of Incorporation)

(Commission File Number)

(I.R.S. Employer

Identification Number)

1288 Pear Avenue

Mountain View, California 94043

(Address of principal executive offices, including zip code)

(650) 210-1200

(Registrant’s telephone number, including area code)

Not Applicable

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

Item 7: Financial Statements, Pro Forma Financial Information and Exhibits.

(c)

Exhibits.

The following exhibits are filed with this Form 8-K:

99.1 Press Release dated August 4, 2004.

Item 12: Results of Operations and Financial Condition.

On August 4, 2004 we issued a press release, which sets forth our results of operations for the quarter ended June 30, 2004. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not incorporated by reference into any filing of the company, whether made before or after the date hereof, regardless of any general incorporation language 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: August 4, 2004	By:	/s/ Thomas G. Klopack
		Thomas G. Klopack
		Chief Executive Officer

Exhibit Index

Exhibit 99.1 Press Release dated August 4, 2004.

ACLARA BIOSCIENCES INC 8-K