Exhibit 8(a) LIST OF SUBSIDIARIES - ------------------------------------------------------------------------------ ----------------------- Name Jurisdiction of Incorporation - ------------------------------------------------------------------------------ ----------------------- Petrobras Distribuidora S.A. - BR (2) Brazil - ------------------------------------------------------------------------------ ----------------------- Petrobras Internacional S.A. - BRASPETRO (2) Brazil - ------------------------------------------------------------------------------ ----------------------- Braspetro Oil Services Company - BRASOIL Cayman Islands - ------------------------------------------------------------------------------ ----------------------- Petrobras America Inc. - PAI Texas, USA - ------------------------------------------------------------------------------ ----------------------- Petrobras Quimica S.A. - PETROQUISA (2) Brazil - ------------------------------------------------------------------------------ ----------------------- Petrobras Gas S.A. - GASPETRO (2) Brazil - ------------------------------------------------------------------------------ ----------------------- Transportadora Brasileira do Gasoduto Bolivia-Brasil S.A. - TBG Brazil - ------------------------------------------------------------------------------ ----------------------- Servicos de Telecomunicacoes S.A. - Dataflux (1) Brazil - ------------------------------------------------------------------------------ ----------------------- Petrobras Transporte S.A. - TRANSPETRO (2) Brazil - ------------------------------------------------------------------------------ ----------------------- Fronape International Company - FIC Cayman Islands - ------------------------------------------------------------------------------ ----------------------- Petrobras International Finance Co. - PIFCo (2) Cayman Islands - ------------------------------------------------------------------------------ ----------------------- Petrobras Europe Limited (1) United Kingdom - ------------------------------------------------------------------------------ ----------------------- Petrobras Netherlands B.V. (1) Netherlands - ------------------------------------------------------------------------------ ----------------------- Petrobras Finance Ltd. (1) Cayman - ------------------------------------------------------------------------------ ----------------------- Downstream Participacoes S.A. (2) Brazil - ------------------------------------------------------------------------------ ----------------------- Petrobras Negocios Eletronicos S.A. (E-PETRO) (1)(2) Brazil - ------------------------------------------------------------------------------ ----------------------- Note: (1) Subsidiaries incorporated in 2001 and 2002. (2) Direct subsidiaries of Petrobras.