The invention relates to a switching device, in particular an on-load tap changer, having a housing and at least one exchangeable switching module. The switching device (1), in particular on-load tap changer, comprises a housing (2); an exchangeable switching module (3, 3′, 3″); a fixed contact (20) arranged inside the housing (2); a guide rail (25) arranged inside the housing (2). The switching module (3, 3′, 3″) has a movable contact (10) that can be releasably connected to the fixed contact (20). The switching module (3, 3′, 3″) has a lower distribution plate (51) that is movably connected to the guide rail (25).