Abstract: An illuminated switch device including a single light source and an operating knob provided with an indicator adapted to be illuminated in different selective colors by a light from the light source. The switch device further includes a light transmissive member fixed to the operating knob, a case for slidably mounting the operating knob therein which case has first and second openings at positions perpendicular to each other, a shutter rotatably supported to the case and adapted to selectively open and close the first and second openings by reciprocation of the operating knob, and transparent color filters having a light transmissivity provided in light paths passing through the first and second openings.