Head-up display system for vehicle

A Head-up display system includes a display (11) for projecting a light to provide a display image, and a reflecting means (2) located in the proximity of a front windshield glass (7) of the vehicle. The reflecting means (2) has a reflection surface (21) for receiving the light projected from the display (11) to reflect toward a driver so that the driver can see the light reflected by the reflecting means (2) as a virtual display image (20) in a vehicle-front of the vehicle. The reflection surface (21) forms a background of the virtual display image (20), being set to have a color darker than a color of the display.