HEAD-UP DISPLAY

The present disclosure provides a head-up display that can prevent generation of stray light from the edge surface by a method other than black coating. The head-up display (100) is for displaying an image as a virtual image (I) to an observer (D) and includes a projection optical system (140) for enlarging and projecting the image. The projection optical system (140) includes a lens element (123) and a reflecting mirror (125). A light beam reaching a center of a viewpoint region (300) of the observer (D) and corresponding to a center of the virtual image (I) is defined as a reference light beam (Lc). The lens element (123) is disposed to be inclined with respect to the reference light beam (Lc). The lens element (123) includes an entrance surface on which light of the image is incident, an exit surface from which light of the image emerges, a first edge portion (123a), and a second edge portion (123b). The second edge portion (123b) is inclined so that, when light emitted from the image travels through the entrance surface, the second edge portion (123b), and the exit surface in this order, light emerging from the exit surface reaches below a central portion of the reflecting mirror (125).