A switch device includes a switch body including a switch contact point, a lever unit pivoted about the switch body to switch the switch contact point between different states, and a guard arranged on a lever shaft of the lever unit and shaped to conceal the switch body at the proximal end of the lever shaft. The lever shaft includes a root portion, which is connected to the switch body, and a bent portion, which is bent and extended from the root portion. The guard is shaped so that the distance to a pivotal center of the lever unit is not constant.