Fastfender fender hook for the quick attachment of fenders to the pipe railing of motor yachts. This ingenious fender hook enables quick attachment and relocation of the fender without knots, by simply hooking it in, an advantage especially for small and inexperienced crew. The integrated clamping device allows the length of the fender line to be adjusted quickly. An unintentional loosening of the hook or the fender line is prevented by the ingenious construction.