An illuminated switch device includes: a casing with an open upper side that has a partition wall formed on the inner bottom thereof; light sources that are provided on the inner bottom in a plurality of regions partitioned by the partition wall; an operating body that includes an outer housing and a light-shielding wall which divides a space surrounded by the outer housing and covered with an upper plate into a plurality of small spaces; and a switch element that is driven when the operating body is pressed. Guide rails are slidably fitted to concave grooves to guide the movement of the outer housing in the vertical direction. Both ends of the light-shielding wall 9 extending to the outside of the outer housing 8 serve as the guide rails.