Head-up display device

A head-up display device comprises a housing, a translucent cover, a display unit that displays an image, an optical system, and an imaging unit that is provided outside a path of display light of the image within the housing and has a light emitting element and an imaging element. When seen in plan view from above, the housing is disposed between a display light passing region through which the display light passes, and an imaging element region corresponding to the imaging element located below the translucent cover, and when seen from the occupant, the imaging element region is provided on the end side that is the side opposite to the center side of a vehicle in the width direction of the vehicle with respect to the display light passing region.