A display control device that is configured to control output of display data to a plurality of display units (160A; 160B) that are arranged on different surfaces of a case, comprising: an inclination detection unit (510, 182) that is configured to detect an inclination of the case with reference to a ground surface; a visibility state determination unit that is configured to determine a display unit (160A; 160B) that is visually recognizable to a user from among the plurality of display units (160A; 160B) according to the inclination of the case detected by the inclination detection unit (510, 182); and a display data output unit that is configured to output the display data to the display unit (160A; 160B) that has been determined as visually recognizable to a user by the visibility state determination unit, wherein the display data includes data of a plurality of display items, and the display data output unit is configured to output data of the display items that are allowed to be visually recognized by others from among the plurality of display items to the display unit (160A; 160B) that has been determined as visually recognizable to the user and not to output data of display items that are not allowed to be visually recognized by others to the display unit (160A; 160B) that has been determined as visually recognizable to the user, and is configured to output or not to output data of all the display items to a display unit (160A; 160B) that has been determined as not being visually recognizable to the user. an inclination detection unit (510, 182) that is configured to detect an inclination of the case with reference to a ground surface; a visibility state determination unit that is configured to determine a display unit (160A; 160B) that is visually recognizable to a user from among the plurality of display units (160A; 160B) according to the inclination of the case detected by the inclination detection unit (510, 182); and a display data output unit that is configured to output the display data to the display unit (160A; 160B) that has been determined as visually recognizable to a user by the visibility state determination unit, wherein the display data includes data of a plurality of display items, and the display data output unit is configured to output data of the display items that are allowed to be visually recognized by others from among the plurality of display items to the display unit (160A; 160B) that has been determined as visually recognizable to the user and not to output data of display items that are not allowed to be visually recognized by others to the display unit (160A; 160B) that has been determined as visually recognizable to the user, to output data of the display items that are allowed to be visually recognized by others from among the plurality of display items to the display unit (160A; 160B) that has been determined as visually recognizable to the user and not to output data of display items that are not allowed to be visually recognized by others to the display unit (160A; 160B) that has been determined as visually recognizable to the user, and is configured to output or not to output data of all the display items to a display unit (160A; 160B) that has been determined as not being visually recognizable to the user.