To provide a vehicular switch device capable of executing sufficient lighting display without increasing a light emission quantity of a light source and of surely suppressing pseudo lighting.

This vehicular switch device is provided with: a switch body 1; a roller member 2 installed in the switch body 1 so as to be slidable between an on-position and an off-position of a predetermined switch; a button part 3 for sliding the roller member 2; a first light source 4 lit when the roller member 2 is located at the off-position and the on-position; a second light source 5 lit when the roller member 2 is located only at the on-position; a first transmission part 6 for transmitting light radiated from the first light source 4; and a second transmission part 7 for transmitting light radiated from the second light source 5. This vehicular switch device is equipped with a tubular shielding member 11 extended from the second transmission part 7 toward the second light source 5 for transmitting the light radiated from the second light source 5 while shielding circumferential diffusive light.