It is configured to have a first hydraulic pump connected to a drive source, a second hydraulic pump connected to a rotor of the first hydraulic pump, a first regulator valve that regulates pressure of the hydraulic oil discharged from the first hydraulic pump to a third oil passage that connects a discharge port of the first hydraulic pump and a hydraulic actuator, a fourth oil passage that connects the second hydraulic pump and a lubrication system of the hydraulic actuator, a second regulator valve that regulates pressure of the hydraulic oil discharged from the first regulator valve to a pressure lower than a line pressure, and an one-way valve that is installed in a second oil passage connecting the second hydraulic pump and a reservoir and permits supply of hydraulic oil from the reservoir only to the second hydraulic pump.