The present invention for opening and closing the main channel, the main channel for supplying the reservoir, a hydraulic supply unit for supplying braking pressure to the wheel cylinder by sucking the fluid from the reservoir, a dynamic pressure of the hydraulic pressure supply unit that the working oil is stored in the wheel cylinder the pressure valve, the master cylinder, the sub flow path for supplying the braking pressure in the master cylinder to the main channel to generate a dynamic pressure, cut off for opening and closing the sub flow path valve, and a main above in the shut-off valve and all the pressure valves are closed, If the detected pressure in the flow paths to detect the pressure higher than the set value, the leakage of the pressure valve, which by opening and closing a braking pressure on the hydraulic brake device and a control method for a control unit determines that has occurred leakage in the pressure valve It detected it is possible to remove the drag caused by unnecessary braking pressure.