A switching device (2) for a multi-step vehicle transmission (4) having one main transmission part (6) and an auxiliary-section transmission part (10) comprising the switching mechanisms (12, 14, 18, 38) for actuating switching elements (44, 50, 52, 54) in the main transmission part (6) and switching mechanisms (12, 14, 18, 38) for actuating switching elements (42, 46) in the auxiliary-section transmission part (10). The switching mechanisms (12, 14, 18, 38) for actuating the switching elements (44, 50, 52, 54) in the main transmission part (6) also actuate the switching elements (42, 46) in the auxiliary-section transmission part (10).