SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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                                    FORM 6-K

                            Report of Foreign Issuer

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

                    under the Securities Exchange Act of 1934

                             Dated December 13, 2006

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                        Commission File Number: 001-14666

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                            MITTAL STEEL COMPANY N.V.

                 (Translation of registrant's name into English)

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                             15th Floor, Hofplein 20
                                3032 AC Rotterdam
                                 The Netherlands
              (Address of registrant's principal executive offices)
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         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
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         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):
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         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):
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         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
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If "Yes, is marked, indicate below the file number assigned to the registrant in
                    connection with Rule 12g3-2(b): 82-_____.






INDEX
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Exhibit 99.1   Arcelor Mittal announces sale of Italian long carbon steel
               production






                                   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: December 13, 2006                     By:     /s/ Henk Scheffer
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                                            Name:  Henk Scheffer
                                            Title: Company Secretary






                                  EXHIBIT INDEX
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Exhibit 99.1   Arcelor Mittal announces sale of Italian long carbon steel
               production