HYDROGEN SUPPLY SYSTEM, FUEL CELL SYSTEM, AND WORKING MACHINE INCLUDING HYDROGEN SUPPLY SYSTEM AND FUEL CELL SYSTEM

A tractor including a vehicle body, a hood at a front portion of the vehicle body, a traveling device to support the vehicle body so that the vehicle body is capable of traveling, a driving motor to drive the traveling device, a PTO shaft to transmit power to a working machine, a fuel cell system including a fuel cell and operable to supply electricity generated by the fuel cell to the driving motor, and a battery to store electricity generated by the fuel cell. The fuel cell and the battery are disposed inside the hood.