This input terminal device 1 for receiving a user operation via a position input object PS is provided with: a position detection unit 106 which detects the position of the position input object; a display unit 109a which displays a cursor; and an operation processing control unit 1024 which causes operation processing to be performed. The operation processing control unit has a plurality of operation modes and one of these modes includes a state M0 in which the operation processing control unit does not cause any operation processing to be performed, except for movement of the cursor in accordance with the position of the position input object. The operation processing control unit is configured to switch between the plurality of operation modes when the user has performed a specific operation by means of the position input object.