An apparatus for controlling the irradiation direction of a lamp for a vehicle is provided with an actuator 3R for controlling the irradiation direction of a headlamp 2R and a controller (ECU) 1 for controlling the actuator 3R in accordance with a pitch angle of a vehicle. The controller 1 includes a monitor unit for monitoring the state of a control signal line CL for sending a control signal for controlling the actuator 3R and determines an abnormality of the controller, the actuator or the control signal line based on the state of the control signal line. The controller is not required to be connected to the actuator via a wire harness dedicated for the monitoring which is provided independently, so that the number of the wire harnesses can be prevented from increasing. Further, since the actuator is not required to be provided with a dedicated monitor circuit, the configuration of the actuator is prevented from being complicated.