The invention relates to a parking brake system (10) for a vehicle, in particular for a motor vehicle, comprising two control units (12, 14), by means of which two actuators (24, 26), which are designed to actuate respective wheel brakes (28, 30), can be controlled, wherein the control units (12, 14) are connected to a power source (20) via separate lines (16, 18), wherein exclusively one of the control units (12, 14) is connected to an operating device (32), the operating device (32) is designed to transmit signals to said control unit (12, 14) for actuation of the wheel brakes (28, 30) and the control unit (12, 14) is designed to control at least one of the actuators (24, 26), dependent on the signals for actuation of the wheel brakes (28, 30).