To provide a braking device for vehicle which can perform regenerative cooperation control without largely changing a conventional braking device.

A primary piston 36 and a secondary piston 33 are movably provided in inside of a cylinder part 311. Thereby a primary chamber PC and a secondary chamber SC are formed. A differential valve 91 is formed between the primary chamber PC and an ABS actuators 5. If driving fluid pressure from a power fluid pressure source 7 is supplied to a driving chamber DC, a primary piston 36 and a secondary piston 33 move inside of the cylinder part 311, and the fluid pressure generates in the primary chamber PC and the secondary chamber SC. The fluid pressure of the primary chamber PC is decompressed by a differential valve 91. In an initial braking, the fluid pressures of wheel cylinders WC 3, WC4 at the rear wheel side is set lower than the wheel cylinders WC 1, WC2 at the front wheel side.