Image display device and light-shielding member

An image display device including an optical observation system configured to guide light to eyes of an observer using the image display device, the image display device comprising:

• a housing provided with the optical observation system;
• a mounting unit configured to mount the housing to a head of the observer;
• and
• a light-shielding member provided on the housing and configured to block external light to be incident between the optical observation system and a face of the observer, the light-shielding member including a concave light-shielding portion having a side surface and top and bottom surfaces continuous with the side surface, and having, on an inside thereof, a space configured to accommodate a temple of eyeglasses worn by the observer,
• wherein the light-shielding member is pivotable in a direction away from the face of the observer and the housing about a pivot axis extending in an up-down direction and in a direction approaching the face of the observer, and, when the light-shielding portion is viewed along a direction in which the pivot axis extends, in a state where the light-shielding portion is away from the face of the observer and the housing, the light-shielding portion is positioned so as not to overlap with the eyeglasses worn by the observer and, in that state, the light-shielding portion is not caused, by a flip-up operation performed on the housing, to come into contact with the eyeglasses.