Exhibit 15.1

KPMG	KPMG Auditores Independentes
	Av. Almirante Barroso, 52 — 4°
	20031-000 — Rio de Janeiro, RJ — Brasil	Central Tel   55 (21) 2515-9400
	Caixa Postal 2888	Fax               55 (21) 3515-9000
	20001-970 — Rio de Janeiro, RJ — Brasil	Internet        www.kpmg.com.br

To
Petróleo Brasileiro S.A.—Petrobras
Rio de Janeiro, Brazil

October 21, 2009

With respect to the registration statement on Form F-3 (333-139459), we acknowledge our awareness of the incorporation by reference therein of our report dated September 9, 2009, related to our review of interim financial information of Petróleo Brasileiro S.A.—Petrobras.

Pursuant to Rule 436 under the Securities Act of 1933 (the “Act”), such report is not considered part of a registration statement prepared or certified by an independent registered public accounting firm, or a report prepared or certified by an independent registered public accounting firm within the meaning of Sections 7 and 11 of the Act.

/s/ KPMG Auditores Independentes  

KPMG Auditores Independentes 

Rio de Janeiro, Brazil