A head-up display includes a first display device, and a second display device which is provided at a position which is different from a position of the first display device. An optical axis identifying device outputs light beams, which are respectively input from the first display device and second display device, in the identical direction. An enlarged-image forming device enlarges respective images which are formed by the light beams which are output from the first display device and the second display device, based on the light beams which are input from the optical axis identifying device, and forms an image by overlapping the images which are enlarged. A moving device moves at least one of the first display device and the second display device along respective optical axis directions thereof.