Abstract: An operational panel capable of expanding the number of function menus to be selected. The operation panel has a cover 8 which is formed with display window 7a to 7d and equipped with push buttons 10a to 10d, respectively, at the side of the display windows 7a to 7d. The operation panel cover 8 is arranged on its back with two slide sheets 3 and 4 which are superposed one on the other but allowed to slide independently of each other. In accordance with the sliding movements of the slide sheets 3 and 4, micro-switches are turn ON/OFF. The upper slide sheet 3, as located just behind the operational cover 8, is formed with both indicators for indicating the function names and transparent portions. These transparent portions are positioned to face all tile display window 7a to 7d of the operational panel cover 8, when the upper slide sheet 3 is in a predetermined slide position. On the other hand, the lower slide sheet 4 is formed with display portions for displaying the function names.