A head up display superimposes a virtual image on an actual view in accordance with a traveling status of a vehicle. Vehicle information containing a lean of the vehicle in a pitch direction is detected by a first posture sensor, and a lean in a roll direction is detected by a second posture sensor. A controller controls display of video on the basis of the vehicle information. A mirror reflects the video to project the video to a windshield or combiner. A mirror driver changes an angle and/or a position of the mirror. At least one of a display state of the virtual image in a display area for the video or the angle and/or the position of the mirror via the mirror driver is adjusted by the controller on the basis of the lean in the pitch direction and/or the lean in the roll direction.