VIRTUAL IMAGE DISPLAY DEVICE

A virtual image display device includes a display that emits display light, a reflective mirror that has a reflective surface, and a housing that houses the display and the reflective mirror and has an opening. The housing includes a wall structure on a portion of a surface of the housing. The wall structure includes a plurality of first walls that face in a first common direction and a plurality of second walls that face in a second common direction different from the first common direction. The plurality of first walls and the plurality of second walls are alternately arranged and are connected to each other one by one along the surface of the housing.