To lengthen the usable period of a linear valve device controlling the hydraulic pressure of a wheel cylinder.

In the case where targeted hydraulic pressure of wheel cylinders 24 and 26 is the same, required hydraulic pressure control responsiveness is low, and viscosity in a hydraulic fluid is not so high, concurrent hydraulic pressure control takes place. Both of hydraulic pressure in these wheel cylinder 24 and 26 are controlled by that which either side of linear valve devices 50 and 52 is made into a state of being operated. In this case, the other side is kept up in an inoperative state. When the concurrent hydraulic pressure control takes place, it means that both of the linear valve devices 50 and 52 are not operated, so that operation frequency of the linear valve devices 50 and 52 are reduced as far as a portion for that, and thus the usable period of these valve devices can be prolonged.