An engine cooling device includes a first supply pump driven by an engine, a second supply pump driven by an electric motor, a first fluid path switching valve, a temperature detector, a revolution speed detector that detects the revolution speed of the engine, and a controller that controls the actuation of the electric motor and the fluid path switching valve. When the temperature of the engine detected by the temperature detector (engine cooling water temperature) is less than a first predetermined temperature, the controller performs control to restrict the supply of the cooling fluid from the first supply pump to the engine by switching the fluid path switching valve to a restricted state, and to supply the cooling fluid from the second supply pump to the engine by performing control to drive the electric motor.