To provide a thin sheet switch having a uniform and stable quantity of light to be reflected to the outside.

The sheet switch 10 includes a substrate 1 on which a fixed contact 2 is provided, a domed movable contact member 4 arranged to cover the fixed contact 2 and formed to contact the fixed contact 2 when receiving downward thrust, a light emitting element 6 provided on the substrate 1, a light guide sheet 5 provided to cover the movable contact member 4 for guiding light reflected from the light emitting element 6, and a plurality of light reflecting parts 7 with a predetermined thickness which are arranged between the light guide sheet 5 and the movable contact member 4 to form a space S partially between the light guide sheet 5 and the movable contact member 4, for reflecting the light guided by the light guided sheet 5.