A key sheet having a layer and a display section with the sense of the mirror surface is realized at a low cost, in addition, the key sheet which also embodies a illuminating effects is provided. In the key sheet integrated with a film 2 on a surface and a side of a key top body 1 made of a thermoplastic resin, an inorganic substance layer 3 which is 20 to 100 nm in thickness and is 1 to 20% in a transmittance of visible light is formed on the back face of the film.