The head-up display apparatus includes: a vehicle information acquisition unit configured to acquire various kinds of vehicle information which can be detected by a vehicle; a controller configured to control display of a video image based on the vehicle information; a video image display configured to form the video image based on an instruction from the controller; a mirror configured to reflect the video image formed by the video image display to project onto the windshield; a mirror driver configured to change an angle of the mirror based on an instruction from the controller; and a display distance adjusting mechanism configured to adjust a display distance of the virtual image with respect to the driver, and the controller adjusts the angle of the mirror via the mirror driver based on the vehicle information such that the virtual image can be displayed with respect to the driver overlapped with the scenery.