A fuel pump which has excellent heat resistance and salt resistance, is low in cost and light in weight, and which is free from fuel leakage. The fuel pump has a bottom body formed of a thermosetting resin such as bakelite material which has heat resistance and strength, and a top body and a cover formed of a thermoplastic resin. The top body and the cover 16 are assembled with a seal member such as a gasket held between the top body and the cover, and the top body and the bottom body 12 are fixed together by a fixing element. Thereby, the main body portions of the fuel pump are constituted of resin.