A luggage carrier for use on a two-wheeled vehicle, having a container with two compartments forming a wheel housing which extends on both sides of a wheel of the vehicle. The container is secured on a first end to a frame of the vehicle and supported on a second end by the wheel hub of the vehicle. An opening at a top of the container is sealed by a lid, the lid (7) forming a seat back, a shell edge (8) of the seat back seated on a first horizontal pivoting shaft (9) of a guide fitting (10). The guide fitting (10) is pivotably engaged to the container on a second horizontal pivoting shaft (11). The seat back is pivotable out of a closed position into an upright open position on the shell edge (8) around the first horizontal pivoting shaft (9). When the seat back is in the upright open position it is further pivotable around the second horizontal pivoting shaft (11) into a child seat by means of a guide fitting (10) into a higher position above the opening (6) and onto the wheel housing (2).