A cellular telephone device with a control unit sets a display mode of a display unit to any one of a first display mode for performing two-dimensional display, and a second display mode for performing three-dimensional display; the cellular telephone device displays both of first information and second information, which is subordinate information to the first information, on the display unit, in a case of being set to the second display mode; and the cellular telephone device displays any one of the first information and the second information on the display unit, in a case of being set to the first display mode.