A sheet switch module including a sheet switch (21) having a central contact (32) disposed on a circuit board (33), a circumferential contact (20) disposed circumferentially of the central contact (32), a spring (22) disposed above the central contact (32), and a transparent sheet member (23) configured to cover the spring (22), the sheet switch (21) forming a switching circuit such that the spring (22) provides electrical conduction between the central contact (32) and the circumferential contact (20) when the sheet member is pressed, the sheet member (23) being formed by a light guiding sheet (30) configured to guide light emitted from an LED (34) along an upper surface of the spring (22).