Abstract: The invention relates to a locking device (11) with a bolt part (13) and a lock part (15) for arrangement on a room-closing element having an opening and a door (17) closing the opening. The bolt part (13) has a longitudinal guiding device (25) and a bolt (23) that can be displaced in a longitudinal displacement direction (21) with respect to the longitudinal guiding device (25). The lock part (15) has a receiving opening (29) for receiving a first end of the bolt (23). The bolt part (13) has in addition to the longitudinal guiding device (25) a transverse guiding device. Spring means (39), which are in active engagement with the longitudinal guiding device (25) and the transverse guiding device cushion a displacement of the bolt (23) in a transverse adjustment direction (47). The adjustment direction (47) is directed transversely to the displacement direction (21) of the bolt (23) and parallel to the door plane and is defined by the transverse guiding device (34).