According to various embodiments of the present invention, a head mounting device (HMD) may comprise: a facial wearing part which is worn on a user's face and outputs an image to both of a user's eyes; a wearing band part mounted on an upper side of the facial wearing part; and a support part which is mounted on the wearing band part to support a user's head, wherein the facial wearing part may comprise a housing in which an optical device is disposed, a guide member which extends over a first surface of the housing and is formed corresponding to a contour of the user's face, and a fixing plate which is mounted on the housing with a part of the guide member interposed between the fixing plate and the housing so as to fix the guide member to the housing. The head mounting device as mentioned above can be various according to embodiments.