Abstract: A locking device for motor vehicle roof trunks has a bottom part and a lid. On two sides of the trunk (1), which extend parallel relative to one another, the lid (3) is pivotable by two hinges around a hinge axis relative to the bottom part (2). The hinges each include a first hinge part (14) associated with the lid (3) and a second hinge part (15) associated with the bottom part (2). All hinges have a common actuating rod (23) which includes hinge pins (30) movable parallel to the direction of the hinge axis (12). Each hinge pin (30) is movably guided in a bearing housing (21) associated with the bottom part (2) and may engage a sleeve (17) associated with the first hinge part (14). A cylinder lock (34) enables all hinges associated with one side to be actuated centrally by actuating the actuating rod 23 towards the closed or open position.