Abstract: A closure for flexible containers made of hose- or sack-shaped semi-finished products for transporting and storing of flowable or pourable goods, with several rod-shaped or tubular clamps, which are arranged one upon another in side supports and securable in their position to each other and through their separation places one end of the hose- or sack-shaped semi-finished product can be led. In order that the closure can also withstand strong jolt stresses on the filled containers, the clamps are arranged clampable with respect to one another in the supports surrounding their ends and clampable with respect to each other, having one clamping device each which can be inserted into each support.