VEHICLE DISPLAY DEVICE

A vehicle display device (1) includes an output unit (10) that outputs output light of display information to be visually recognized as a virtual image by an occupant in a vehicle cabin, a reflector (30) that directly or indirectly receives the output light, and reflects the output light toward an eye box (EB) indicating a region in which the occupant can visibly recognize the virtual image, and a controller (20) that controls an operation of the output unit. The output unit (10) includes a display unit (11) that emits the display information as display light, a turning-back mirror (12) that reflects, as the output light, the display light emitted from the display unit (11), a holding member (13) that holds the display unit (11) and the turning-back mirror (12) without changing relative positions of the display unit (11) and the turning-back mirror (12), and a drive mechanism (14) that can reciprocate the holding member (13) along an optical axial direction of the turning-back mirror (12).