BRAKING DEVICE FOR VEHICLE

A master cylinder (21) generates a master cylinder pressure in response to a stepping operation by a driver on a brake pedal (10). A power hydraulic pressure generation device (30) includes a pressurizing pump (31) and an accumulator (32), and a hydraulic pressure of a working fluid pressurized by the pressurizing pump (31) is accumulated by the accumulator (32) as an accumulator pressure. A pressure increasing mechanism (80) communicates to the master cylinder (21) and the accumulator (32), mechanically moves in response to the master cylinder pressure supplied from the master cylinder (21), and uses the accumulator pressure supplied from the accumulator (32) to generate a servo pressure. A pressure increasing mechanism cut valve (90) serving as a shut-off valve is a normally-closed electromagnetic on-off valve, and is provided on a high pressure supply passage (15) for communication between the accumulator (32) and the pressure increasing mechanism (80). The pressure increasing mechanism cut valve (90) is controlled by a brake ECU (100) to be in a closed state for shutting off the communication between the accumulator (32) and the pressure increasing mechanism (80).