Disclosed is an integrated braking system including a hydraulic piston cylinder unit that is operated by a brake pedal, a pressure medium storage unit that is connected to the hydraulic piston cylinder unit, a pressure generating unit that is driven by a motor, and has first and second hydraulic chambers that are divided by a piston movable within a housing, and a pressure control unit that transmits a pressure to a wheel unit from the hydraulic piston cylinder unit and the pressure generating unit. A hydraulic line directly connects the first hydraulic chamber and the pressure medium storage unit.