A brake device for a vehicle comprises a master cylinder; a power hydraulic pressure source; a valve mechanism comprising a plurality of electromagnetic valves; a wheel cylinder for applying a braking force to a wheel; control means for controlling an operation of the valve mechanism; and upstream side hydraulic pressure adjustment means comprising an electromagnetic valve to be controlled by an electric signal in order to decrease a hydraulic pressure on an upstream side. The control means is configured to control the plurality of electromagnetic valves during an abnormal state in which there is a possibility of a leak of a working fluid in a brake system and to maintain the upstream side hydraulic pressure adjustment means in an operation preparation state so as to suppress a change in hydraulic pressure on the upstream side.