The utility model relates to a switching device, and the switching device enables the sliding of a sliding part to be independent of switching operation through a simple structure. The sliding part (1) slides in a following manner that the position of a front end serving as the sliding part (1) on a sliding contact part (E) is closer to the position of a contact position (T) than a connecting line (P) between a connecting shaft (S) and a supporting point (R), and the elastic deformation of a spring 14 is maximum.