Abstract: A system including a pin and a wire suitable for fixing a ligament graft to a bone, consists a body having a cylindrical cavity capable of receiving a wire itself attached to the end of the ligament graft and intended to be threaded into a tunnel formed in the bone, the cavity traversing the pin from side to side, through the centre of same, forming an entry port and an exit port of the wire, the body being capable of blocking the wire and being positioned in a housing formed in the cortical portion of the tunnel in the bone. The wire is blocked in the pin preferably using a sleeve-cap compressing the cylinder from the outside to the inside.