A head mounted display configured to perform wireless communication with a plurality of terminals (40, 40a, 40b), comprising: a wireless communication interface configured to perform wireless communication with the plurality of terminals (40, 40a, and 40b); a main controller operable to detect a line-of-sight direction of a user and specify a single terminal out of the plurality of terminals (40, 40a, 40b) based on the detected line-of-sight direction of the user; a display controller operable to cause an operation panel or at least one setting screen of the terminal (40, 40a, 40b) specified by the main controller to be displayed such as to be viewable to the user; and an environment image capturing section configured to capture an image of a surrounding environment within the user's field of view, wherein the main controller is operable to determine whether or not a specific object is present within the user's field of view based on the image of the surrounding environment, and inhibit change of the setting screen during determination that the specific object is present within the user's field of view, the main controller is operable to detect a motion of the specific object toward the operation panel or the at least one setting screen based on the image of the surrounding environment, and the wireless communication interface is operable to transmit a signal corresponding to a motion of the specific object detected by the main controller to the terminal (40, 40a, and 40b) specified by the main controller. a wireless communication interface configured to perform wireless communication with the plurality of terminals (40, 40a, and 40b); a main controller operable to detect a line-of-sight direction of a user and specify a single terminal out of the plurality of terminals (40, 40a, 40b) based on the detected line-of-sight direction of the user; a display controller operable to cause an operation panel or at least one setting screen of the terminal (40, 40a, 40b) specified by the main controller to be displayed such as to be viewable to the user; and an environment image capturing section configured to capture an image of a surrounding environment within the user's field of view, wherein the main controller is operable to determine whether or not a specific object is present within the user's field of view based on the image of the surrounding environment, and inhibit change of the setting screen during determination that the specific object is present within the user's field of view, determine whether or not a specific object is present within the user's field of view based on the image of the surrounding environment, and inhibit change of the setting screen during determination that the specific object is present within the user's field of view, the main controller is operable to detect a motion of the specific object toward the operation panel or the at least one setting screen based on the image of the surrounding environment, and the wireless communication interface is operable to transmit a signal corresponding to a motion of the specific object detected by the main controller to the terminal (40, 40a, and 40b) specified by the main controller.