A multi-letter selection emitting light key using a keycap having a color filter layer having an LED film and a pass band mounted on LED are provided to perform commercialization operation of the multi-letter selection emitting light key without change of the lighting keyboard selecting multi-character. A key cap(200) is inserted into an upper plate(140). The key cap is slid to the top and bottom. An LED(Light Emitting Diode) film(135) sets up LEDs(136, 137) mounted on the top plate. A controller converts the signal of the switch film into data. The controller controls LED of the LED film with the command of the command of the computer of the outside or the inside.
