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): October 26, 2004


                            IRIS INTERNATIONAL, INC.
             (Exact name of registrant as specified in its charter)


         DELAWARE                       1-11181                  94-2579751
(State or other jurisdiction    (Commission File Number)      (I.R.S. Employer
   of incorporation)                                         Identification No.)


                                9172 ETON AVENUE
                              CHATSWORTH, CA 91311
                (Address of Principal Executive Offices/Zip Code)


                                 (818) 709-1244
              (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 (SEE General Instruction A.2. below):

|_|  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 ct (17 CFR 240.14d-2(B))

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





ITEM 7.01 - REGULATION FD DISCLOSURE

         On October 26, 2004,  IRIS  International,  Inc. issued a press release
announcing  its  financial  results for the third  quarter and nine months ended
September  30, 2004. A copy of the press  release is attached  hereto as Exhibit
99.1 and is incorporated herein by this reference.

         The information in this report shall not be deemed "filed" for purposes
of Section 18 of the  Securities  Exchange  Act of 1934,  nor shall it be deemed
incorporated  by reference in any filing under the Securities Act of 1933 or the
Securities  Exchange  Act of 1934,  except  as shall be  expressly  set forth by
specific reference in such a filing.


ITEM 9.01 - FINANCIAL STATEMENTS AND EXHIBITS

         (a)      Financial Statements of business acquired.

                  Not applicable.

         (b)      Pro Forma Financial Information.

                  Not applicable.

         (c)      Exhibits.

                  The following exhibits are filed herewith:

                  EXHIBIT
                  NUMBER   DESCRIPTION
                  -------  -----------

                  99.1     Press Release  dated  October 26, 2004,  published by
                           IRIS International, Inc.


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                                    SIGNATURE

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


                                     IRIS INTERNATIONAL, INC.



Date:    October 26, 2004            By:      /S/ MARTIN G. PARAVATO
                                              ----------------------------------
                                              Martin G. Paravato
                                              Chief Financial Officer


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                                  EXHIBIT INDEX

EXHIBIT
NUMBER         DESCRIPTION
- -------        -----------

99.1           Press  Release   dated  October  26,  2004,   published  by  IRIS
               International, Inc.


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