FUEL SUPPLY DEVICE

Provided is a pressure regulator (76) that is provided with a return flow path (78). The return flow path (78) is provided in the inner side of an upper cup (25) and is disposed on the plane of projection of a fuel pump (3) when viewed from an axial direction. The return flow path (78) that communicates between a pressure regulator (76) and a reservoir portion (11), and guides fuel discharged from the pressure regulator (76) to the reservoir portion (11) between the fuel pump (3) and the upper cup (25) and between the fuel pump (3) and a flange unit (4).