To provide a fuel supplier for a small ship which can avoid inferiority of starting generated by an increase of pressure in a fuel tank.

In this fuel supplier for a water vehicle (small ship), mounting an engine 10 and a fuel tank 9 in a ship body 2 formed in almost water-tightness so as to supply fuel of this fuel tank 9 to the engine 10 by a fuel pump 47 through a carburetor 22, a fuel return pipe 71 returning a surplus amount of fuel supplied to the carburetor 22 to the fuel tank 9 is provided, and a check valve 72 impeding a pressure in a side of the fuel tank 9 from acting in a side of the carburetor 22 is provided in this fuel return pipe 71.