VEHICULAR DISPLAY DEVICE

A vehicular display device (1) includes: a reflection-type hologram (2) disposed inside a windshield (101) of a vehicle and including a first surface (21) facing a side of an eye range (ER) of the vehicle; and a projection device (3) that projects display light (10) of a P wave toward the first surface. The hologram outputs the display light, which is incident on the first surface from the projection device, as diffracted light (30) directed to the eye range, and has diffraction characteristics of condensing the diffracted light in the eye range. The projection device is disposed such that a part of the display light is reflected toward the eye range when an incident angle of the display light on the windshield is within a predetermined angle range (Ry).