Vehicle brake system

A vehicle brake system comprising:

• a hydraulic pressure generating device including a master cylinder that generates a brake hydraulic pressure in accordance with an operation amount of a brake operator and a slave cylinder that generates a brake hydraulic pressure by driving an electric actuator;
• and
• a hydraulic pressure control device that controls a brake hydraulic pressure acting on a wheel brake by a brake hydraulic pressure from the hydraulic pressure generation device, wherein the hydraulic pressure generation device includes:
• a master cut valve that opens and closes a main hydraulic passage leading from the master cylinder to the hydraulic pressure control device, a communication passage leading from the slave cylinder to the main hydraulic passage on a downstream side of the master cut valve, a shut-off valve that opens and closes the communication passage, and a control device that controls operations of the slave cylinder, the master cut valve, and the shut-off valve, wherein
• the main hydraulic passage includes a first main hydraulic passage communicating with at least one of a plurality of wheel brakes and a second main hydraulic passage communicating with remaining wheel brakes, wherein
• the master cut valve, the communication passage, and the shut-off valve are provided in each of the first main hydraulic passage and the second main hydraulic passage, wherein
• the control device controls, when the hydraulic pressure control device is not operated, the slave cylinder to generate a brake hydraulic pressure, and performs antilock brake control by controlling the master cut valve and the shut-off valve for each of the first main hydraulic passage and the second main hydraulic passage based on a slip state of wheels.