A window pane assembly for a vehicle includes a window pane that moves in a receiving gap of a receiving shaft between a closed position and an open position. The window pane completely covers a window opening in the closed position and at least partially exposes the window opening in the open position. The window pane includes a first edge region facing the vehicle roof and a second edge region located opposite the first edge region and received in the receiving gap of the receiving shaft. The window pane has a wedge-shaped thickened section on an outer face of the window pane at the second edge region. The thickened section engages an outer seal element when the window is set in the closed position and the vehicle is driving. The thickened section is spatially separated from the outer seal element when the vehicle is parked.