a pressure-increasing valve disposed in a first hydraulic circuit between a master cylinder generating a master cylinder hydraulic pressure and a wheel cylinder, and adjusting a differential pressure between the master cylinder hydraulic pressure and a wheel cylinder hydraulic pressure in the wheel cylinder proportionally in accordance with a first energizing current value provided to the pressure-increasing valve; and

a pressure-reducing valve disposed in a second hydraulic circuit between the wheel cylinder and a reservoir and being opened and closed in accordance with a second energizing current value provided to the pressure-reducing valve, comprising:

anti-skid control means for continuously executing, plural times, an anti-skid control that is started in response to an establishment of a predetermined anti-skid control start condition, and in which anti-skid control, a pressure-reducing control for reducing the wheel cylinder hydraulic pressure is executed by controlling the first energizing current value and the second energizing current value and then a linear pressure-increasing control for increasing the wheel cylinder hydraulic pressure linearly continues to be executed by changing the first energizing current value with a basic pattern, in which pattern the first energizing current value linearly changes with a constant negative slope while the pressure-reducing valve is maintained in its closed state through controlling the second energizing current value until the next anti-skid control start condition is established, wherein

the anti-skid control means is configured to set the first energizing current value to values, instead of the values corresponding to the basic pattern, for maintaining the pressure-increasing valve in its closed state over a predetermined period which is a part of a period from a starting point to an ending point of the linear pressure-increasing control in a predetermined-numberth-time anti-skid control, thereby executing a holding control for holding the wheel cylinder hydraulic pressure over the predetermined period.