A keyboard includes a keyboard shell; a supporting panel; a plurality of keycaps; a plurality of keycap supports between the supporting panel and the corresponding keycaps; a plurality of elastomers through the corresponding elastomer holes; an FPC sheet with a plurality of key signal pads corresponding to the plurality of elastomers; a light emitting substrate arranged under the FPC sheet, and a plurality of light emitting light emitting parts arranged on the light emitting substrate; a fixing groove which is used for fixing the supporting panel, the FPC sheet and the light emitting substrate formed on the keyboard shell; the elastomer being arranged on the FPC sheet; the supporting panel, the FPC sheet, and the light emitting substrate being supported in the keyboard shell and the light beams from the light emitting part being guided through the light through holes to the up side of the supporting panel.