A communications system in a first vehicle sends departing information indicating that the first vehicle is about to depart from a parking space along with the vehicle information of the first vehicle when a door is unlocked, a key is inserted, and an engine is started. When the sent departing information is received by a communications system in a different second vehicle that is searching a parking space, the sent vehicle information of the first vehicle is shown in a display device in the second vehicle. The vehicle information includes the number of the license plate, the vehicle kind, the vehicle color, and the vehicle class. The driver of the second vehicle can easily determine whether a nearby vehicle where an occupant is present is the first vehicle that sends the departing information.