                                   FORM 6-K


                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549



                       REPORT OF FOREIGN PRIVATE ISSUER
                       PURSUANT TO RULE 13A-16 OR 15D-16
                   UNDER THE SECURITIES EXCHANGE ACT OF 1934


                              For DecemberJanuary 1517, 20052006


                      Commission File Number: 333-122268



                           MASTELLONE BROTHERS INC.
                (Translation of registrant's name into English)



                           MASTELLONE HERMANOS S.A.
                        E. EZCURRA 365, PISO 2, OF. 310
                      (C1107CLA) BUENOS AIRES, ARGENTINA
                   (Address of principal executive offices)


Indicate by check mark whether the registrant files or will file annual reports
under cover of 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):


                               Yes: [ ]  No: [X]


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):


                               Yes: [ ]  No: [X]


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-

SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1933, the Registrant has duly caused this report signed on its behalf by the undersigned, thereunto duly authorized, in Buenos Aires, Argentina.

MASTELLONE HERMANOS S.A.

Buenos Aires, ~~December~~January 1417, ~~2005~~ 2006.

By: /s/ Rodolfo ~~Gonzalez~~González Name: Rodolfo González Title: Chief Financial Officer

Encarnación Ezcurra 365 – piso 2 oficina 310
(C1107CLA) Buenos Aires – Argentina

TABLE OF CONTENTS

1. English translation of a letter dated January ~~December 14~~17, ~~2005~~2006, filed with the Buenos Aires Stock Exchange, regarding an agreement reached with the ~~purchase~~Argentine Ministry of ~~$2.3~~Economy ~~million,~~and Production ~~face~~about ~~value,~~the prices of ~~Mastellone's~~certain 8%products ~~Senior~~manufactured ~~Notes due 2012~~by us.

~~This letter~~Buenos ~~has~~Aires, ~~just~~January ~~been~~17, ~~filed to the BASE~~2006

Messrs.Buenos Aires, ~~December 14, 2005~~Stock Exchange

~~Buenos~~We ~~Aires~~address ~~Stock~~you, ~~Exchange~~to inform the details of an agreement reached with the Ministry of Economy and Production of Argentina, regarding the price of the following products manufactured by us:

~~Dear~~• ~~Sirs~~Ultra pasteurized, whole fluid milk, brand name "La Serenísima", in one liter pouches,

We• ~~address you in order to inform that we have repurchased for its cancellation US$2,300,000 (two million, three~~Non-~~hundred~~fat ~~thousand,~~powdered ~~U.S. dollars)~~milk, ~~face~~brand ~~value,~~name of"La ~~our 8 % Senior Notes~~Serenísima", maturing on 2012. As a result of this transaction, we had a gain of approximately Ps.1,104,000 due to the difference between the purchase price and the face value of such Senior Notes, partially compensated with a loss (without any cash impact) of Ps. 1,109,000due to the reduction in ~~the~~400 ~~valuation~~grams ~~adjustment of such Senior Notes to their net present value~~boxes, ~~in accordance with the Argentine generally accepted accounting principles.~~

~~We kindly~~• ~~ask~~Pategrás ~~the~~cheese, ~~withdrawal~~in ofsmall ~~the~~portions, ~~Senior~~brand ~~Notes~~name so"La ~~repurchased~~Serenísima", ~~and cancelled.~~per kilogram

~~Yours~~• Reggianito cheese, ~~sincerely~~in small portions, brand name "La Serenísima", per kilogram,


•	Butter, extra quality, brand name "La Serenísima", in 200 grams presentations, and


•	"Dulce de leche" (caramelized condensed milk), Colonial type, brand name "La Serenísima", in 500 grams plastic containers.

According to this agreement, the price for these products will remain unchanged in comparison with our prices as at January 13, 2006, pending to the results of the analysis of cost changes, either historical or future, and not transferred to the selling prices.

This Agreement will remain in force for a one year period, since January 13, 2006.

Very truly tours,

MASTELLONE HERMANOS S.A.

Rodolfo ~~Gonzalez~~D. GonzálezMarket Relations Manager

Encarnación Ezcurra 365 – piso 2 oficina 310
(C1107CLA) Buenos Aires – Argentina

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