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

                                   May 9, 2006
                Date of Report (Date of earliest event reported)

                 CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
             (Exact Name of Registrant as specified in its Charter)

                              ---------------------

          Delaware                       333-92383                06-1397316
(State or Other Jurisdiction)    (Commission File Number)     (I.R.S. Employer
     of Incorporation                                        Identification No.)

                              ---------------------

                             251 Ballardvale Street
                         Wilmington, Massachusetts 01887
               (Address of Principal Executive Offices) (Zip Code)

                                  978-658-6000
              (Registrant's Telephone Number, including Area Code)

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)

|_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (17 CFR 240.14a-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 2.02.  Results of Operations and Financial Condition

The following information shall not be deemed "filed" for purposes of Section 18
of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or
incorporated by reference in any filing under the Securities Act of 1933, as
amended, or the Exchange Act, except as shall be expressly set forth by specific
reference in such a filing.

On May 9, 2006, Charles River Laboratories International, Inc. issued a press
release providing financial results for the first quarter ended April 1, 2006.

The press release, attached as an exhibit to this report, includes "safe harbor"
language pursuant to the Private Securities Litigation Reform Act of 1995, as
amended, indicating that certain statements contained in the press release are
"forward-looking" rather than historic. The press release also states that these
and other risks relating to Charles River are set forth in the documents filed
by Charles River with the Securities and Exchange Commission.



ITEM 9.01.  Financial Statements and Exhibits

     (a) Not applicable.

     (b) Not applicable.

     (c) Not applicable.

     (d) Exhibits.

         99.1       Press release dated May 9, 2006.




                                   SIGNATURES

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

                                CHARLES RIVER LABORATORIES
                                INTERNATIONAL, INC.

Dated: May 9, 2006

                                   By: /s/ Joanne P. Acford
                                       -----------------------------
                                         Joanne P. Acford, Corporate Senior Vice
                                         President, General Counsel and
                                         Corporate Secretary



                                  Exhibit Index


Exhibit No.                 Description
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99.1                        Press release dated May 9, 2006.