A communication system between vehicles of the present invention is equipped in each of the vehicles with an image taking device for taking an image around the vehicle; a moving body detection unit for detecting a moving body from the image taken by the image taking device; a display unit for displaying the image; an image data generation unit for generating image data output to the display unit of the each vehicle; and a transmitting/receiving device for any of transmitting/receiving data, wherein the image data generation unit generates image data for displaying an existence of a moving body, of which an image is taken by said image taking device of one of the vehicles, and outputs the image data to the display unit of other vehicle.