Provided is a light distribution control system for vehicle in which each of left and right head lamp housings is provided with camera that picks up image of the forward area of vehicle, main lamp unit that forms basic light distribution pattern which is symmetric at the forward area of the vehicle, first sub lamp unit that forms first additional light distribution pattern at lateral side of the vehicle as compared to the basic light distribution pattern, second sub lamp unit that forms second additional light distribution pattern at lateral side of the vehicle, and control unit that controls the turning-ON/OFF of the first and second sub lamp units based on the image data of the camera. The control unit may form non-symmetric light distribution pattern as a whole at the forward area of the vehicle according to road environment.