A display device for a vehicle is provided, by which an attaching position
thereof can be altered depending upon an attachment limiting condition of
the vehicle. The display device includes: a display source provided in an
instrument panel of the vehicle; and a prism provided on a light path
between the display source and an aperture of the instrument panel and
refracting display light of an image displayed on the display source
backward in the vehicle, wherein the prism is formed in a shape inclined
upward in a backward direction of the vehicle, wherein (a) a virtual
image of the image projected on a projection area of a windshield of the
vehicle, onto which area the display image from the prism is projected
and (b) a front view of the vehicle to be seen from an eye point of the
vehicle through the windshield are seen in a superimposed manner.