HEAD-UP DISPLAY DEVICE

A head-up display device according to the invention includes a projector that projects an image to be displayed on a windshield of a vehicle; a housing that accommodates the projector and has an opening portion on a pathway of a projection light that is projected from the projector; a transmissive member that blocks the opening portion and transmits the projection light; and a light blocking portion that blocks a light path along which light incident from an outside of the vehicle is reflected on the transmissive member and the windshield and reaches a predetermined viewpoint region on a driver's seat side, wherein the light blocking portion is formed by a printed layer provided in the periphery of the windshield.