A driver for a movable window pane, in particular of a motor vehicle, having a receptacle recess, a receptacle of an edge section of the window pane, and having an elastically displaceable detent lug which is designed to engage in a latching cutout of the window pane in order to arrest the window pane on the driver, wherein the detent lug, in the reset position thereof, obstructs the receptacle recess and has an insertion taper assigned to the receptacle recess such that the detent lug is displaced into a position releasing the receptacle recess by insertion of the window pane into the receptacle recess. The detent lug has a catch groove on the insertion taper which extends parallel to the receptacle recess over the detent lug.