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): March 1, 2005


                            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 2.02 - RESULTS OF OPERATION AND FINANCIAL CONDITION

         On March 1,  2005,  IRIS  International,  Inc.  issued a press  release
announcing its financial  results for the fourth quarter and twelve months ended
December  31, 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 March 1, 2005,  published by IRIS
                           International, Inc.


                                       2



                                    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:    March 1, 2005                   By:  /S/ MARTIN G. PARAVATO            
                                              ----------------------------------
                                              Martin G. Paravato
                                              Chief Financial Officer


                                       3



                                  EXHIBIT INDEX

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


99.1           Press   Release   dated   March  1,  2005,   published   by  IRIS
               International, Inc.


                                       4