On-board fuel cell powered electric vehicle

A fuel cell vehicle comprises a fuel cell for generating electricity by hydrogen and air, a temperature regulating unit for regulating the temperature of the fuel cell, a fuel supply regulating unit for regulating a supply condition of hydrogen to the fuel cell,     a radiator for cooling the cooling fluid; and     a fuel storage unit for storing the fuel, wherein     the radiator, the temperature regulating unit and the fuel supply regulating unit are arranged to align in that order from the front to rear of the vehicle, with the fuel storage unit being disposed rearward of the fuel supply regulating unit in a longitudinal direction of the vehicle, and wherein     the temperature regulating unit, the fuel cell and the fuel supply regulating unit are accommodated in a fuel cell system box disposed on an underside of a floor of the vehicle.