A clamping device (1) for bridging two elements (2a, 2b, 200a), which can be brought closer to each other, with at least one tensioning belt (6, 60) connected with an element (2a, 200a). The tensioning belt engages into an allocated turnbuckle (4) connected with the other element (2b) and is movable with it. The tensioning belt (6, 60) and the turnbuckle (4) are each mountable on the allocated element (2a, 2b, 200a) by a positive plug-in connection. The elements, which can be brought closer to each other (2a, 2b, 200a), are provided with formed retaining structure (10, 100) defined as projections emerging from their plane. The end portion of the tensioning belt (6, 60) facing away from the turnbuckle (4) and a turnbuckle belt (5) defined as a belt lug being applied on the turnbuckle (4) and in opposite direction to the tensioning belt (6, 60) are provided with counter-retaining structure (13, 130) which can be attached on the retaining means (10, 100) of the elements.