HEAD-UP DISPLAY DEVICE

A head-up display apparatus (10) projects a plurality of virtual images of which depths perceived by a user with respect to a virtual-image display unit (WS) disposed in front of the user are different from each other. The head-up display apparatus (10) includes a first projection apparatus (101) and a second projection apparatus (102). The first projection apparatus (101) includes a first display-light emitting unit (110) configured to emit first display light, and a concave mirror (130) configured to reflect the first display light and thereby emit reflected light thereof, and is configured to enable the user to perceive a first virtual image by projecting the reflected light onto a virtual-image display unit (WS). The second projection apparatus (102) includes a second display-light generation unit (140) configured to let the reflected light pass therethrough and generate second display light different from the first display light, and is configured to enable the user to perceive a second virtual image by projecting the generated second display light onto the virtual-image display unit (WS).