Patent ID: 8827528

Claim:
A key sheet that includes a base sheet formed of a transparent resin film and a depressing operation portion formed on an operation surface side of the base sheet, the key sheet being illuminatable, wherein: the base sheet is a light-guiding sheet; and a transparent resin layer is formed on a rear surface of the base sheet, the rear surface being opposite from the operation surface side, the transparent resin layer being made of a cured body of a coating liquid that does not dissolve to the surface of the base sheet, a dark print layer, which shields light, is further formed on a surface of the transparent resin layer, a smooth surface is provided between the base sheet and the dark print layer, and a diffusing part which includes a filling material is formed on the rear surface of the base sheet to direct light transmitting in a surface direction of the base sheet to the depressing operation portion, the diffusing part being formed on a front surface side of the dark print layer, the front surface side being facing the base sheet.