SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                       __________________________________

                                    FORM 6-K

                            Report of Foreign Issuer

                        Pursuant to Rule 13a-16 or 15d-16

                    under the Securities Exchange Act of 1934

                             Dated January 23, 2006

                       __________________________________

                        Commission File Number: 001-14666

                       __________________________________

                            MITTAL STEEL COMPANY N.V.

                 (Translation of registrant's name into English)

                        _________________________________

                             15th Floor, Hofplein 20
                                3032 AC Rotterdam
                                 The Netherlands
              (Address of registrant's principal executive offices)
                       __________________________________

         Indicate by check mark whether the registrant files or will file annual
reports under cover Form 20-F or Form 40-F.

                            Form 20-F X   Form 40-F
                                     ---           ---

         Indicate by check mark if the registrant is submitting the Form 6-K in
paper as permitted by Regulation S-T Rule 101(b)(1): _____

         Indicate by check mark if the registrant is submitting the Form 6-K in
paper as permitted by Regulation S-T Rule 101(b)(7): _____

         Indicate by check mark whether by furnishing the information contained
in this Form, the registrant is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

                                 Yes       No  X
                                    ---       ---

If "Yes, is marked, indicate below the file number assigned to the registrant in
                     connection with Rule 12g3-2(b): 82-_____.




Mittal Steel Company N.V. hereby incorporates this Report on Form 6-K by
reference into its Registration Statement on Form S-8 (Registration No.
333-107102) and its Registration Statement on Form F-3 (Registration No.
333-128742), filed with the Securities and Exchange Commission under the
Securities Act of 1933, as amended (the "Securities Act"), to the extent not
superseded by documents or reports subsequently filed by Mittal Steel Company
N.V. under the Securities Act or the Securities Exchange Act of 1934, as
amended.


INDEX
-----


Exhibit 99.1      Mittal Steel Company N.V.'s press release announcing a change 
                  to Mittal Steel Company N.V.'s shareholding in Hunan Valin 
                  Steel Tube & Wire Company Limited.




                                   SIGNATURES

         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, thereunto duly authorized.

                                                MITTAL STEEL COMPANY N.V.


Date:  January 23, 2006                         By:    /s/ Henk Scheffer
                                                       -------------------------
                                                Name:  Henk Scheffer
                                                Title: Company Secretary




                                  EXHIBIT INDEX
                                  -------------

Exhibit 99.1      Mittal Steel Company N.V.'s press release announcing a change 
                  to Mittal Steel Company N.V.'s shareholding in Hunan Valin 
                  Steel Tube & Wire Company Limited.