Abstract: An apparatus for fastening an end of a spring steel strip subjected to high tension. The end of the spring steel strip is clamped positively between two flat surfaces of two retainers in different positions, ensuring absolute security against loosening. For this purpose, the strip end is placed positively in an insert that is freely displaceable between the retainers and is clamped together with this insert between the retainers. The insert has transverse blades on its side facing away from the strip end, with which blades it engages the adjoining retainer positively, and thus in a displacement-proof manner, in the clamped state.