A fuel supply apparatus is provided having an increased curvature of radius of a fuel pipe. The fuel supply apparatus is provided with a pressure regulator, disposed at a middle portion of a fuel supply pipe interconnecting a fuel pump and an injector, in which fuel is supplied to the pressure regulator from the fuel pump via the fuel pipe, and is then supplied from the pressure regulator to the injector via a fuel pipe and extra fuel is returned from the pressure regulator to a fuel tank via a return pipe. The pressure regulator is disposed in front of a storage box, the fuel pipe and the return pipe are disposed on opposite sides of the storage box, respectively, the pressure regulator is disposed in front of the storage box, and the fuel pipe and the return pipe are disposed in a substantially U-shaped configuration.