A fuel tank (32) has a fuel tank body (34) made of thermoplastic resin, a mounted part (reinforcement (38)) that is mounted on the fuel tank body (34) and is formed of a material different from a material of the fuel tank body (34), a caulking portion (46) formed in the fuel tank body (34) so as to fix the mounted part to the fuel tank body (34), and a support member (50) formed separately from the fuel tank body (34) and attached to the fuel tank body (34) so as to support the mounted part.
