<p>The invention concerns an intramedullary nail to be inserted into a fractured elongated bone and comprising: a cannulated rod (2) extending between a proximal end (3) and a distal end (4); an outside tubular sleeve (5) for receiving said rod (2), the rod (2) being coaxial with the sleeve (5) and axially guided inside the tubular sleeve (5); shape-memory elements (7) housed in corresponding seats (6) of said rod (2); each of the shape-memory elements (7) being able to assume a configuration of rest in which said shape-memory elements (7) are housed in their respective seat (6) to allow the nail to be inserted into the bone, and configuration of use in which said shape-memory elements (7) are projecting from slots (8) in said sleeve (5).</p>
