The present invention is compact and inexpensive, has good light efficiency, and enables a display image having a plurality of display distances to be displayed. A display (21) emits projection light (L) for displaying a display image (M) at a predetermined position, and an image formation position adjusting mirror (23) receives the projection light (L) emitted from the display (21), performs conversion into a plurality of first projection light (L1) and second projection light (L2) that have different image formation distances by changing the image formation distance of the projection light (L) that is at least part of the incident projection light (L), and reflects the first projection light and the second projection light to project the first projection light (L1) and the second projection light (L2) onto a first screen (30) and a second screen (40).