To prevent the occurrence of a distortion in virtual image and to secure a large magnification by making an image forming beam as a virtual image incident on a reflection mirror from a convex lens and enlargingly reflecting it toward a proper place of a front window shield.

When both of the focal point distance of an objective point side focus F1 of the convex lens T and the focal point distance of an image point side focus F2 are made (f), a liquid crystal panel P is arranged between the convex lens T and the objective point side focus F1. The reflection mirror reflects the display beam of the liquid crystal panel P1 image formed as a virtual image by the convex lens T toward the reflection mirror M2. The reflection mirror M2 consists of a sheet of hologram concave mirror having a prescribed magnification K1, and enlarges the reflection beam of the reflection mirror at the magnification K1 to reflects it toward the proper place of the front window shield through an upper wall opening of an instrument panel. That means that the front window shield reflects the reflection beam of the reflection mirror, and image forms the display information of the liquid crystal panel P as the virtual image in the direction of the sight line of a driver.