A vehicular display device includes a housing that includes a wall portion provided with an opening portion through which display light of an image passes toward an outside, and an image display that is accommodated in the housing and outputs the display light of the image. Further, the vehicular display device includes a reflection mirror that is accommodated in the housing and reflects the display light of the image toward a reflector arranged in front of a vehicle occupant. At an edge portion of an upper portion of the reflection mirror, a frame portion that extends along the edge portion and covers the edge portion is arranged.