Intramedullary nail to be inserted into a fractured elongated bone and comprising: a cannulated rod extending between a proximal end and a distal end; an outside tubular sleeve for receiving said rod, the rod being coaxial with the sleeve and axially guided inside the tubular sleeve; shape-memory elements housed in corresponding seats of said rod; each of the shape-memory elements able to assume a configuration of rest in which said shape-memory elements are housed in their respective seats to allow the nail to be inserted into the bone, and a configuration of use in which said shape-memory elements are projecting from slots in said sleeve; wherein - a distal pair of said shape-memory elements is provided at the distal end of the rod; and - a first shape-memory element and a second shape-memory element forming the distal pair lie on an offset plane with respect to each other characterized in that - a pair of transversal passages (23, 24) is provided in the proximal portion of said rod and a pair of corresponding transversal holes (13, 14) is provided in the proximal portion of said sleeve, said holes and passages being intended to receive bone screws and having their respective axes for the insertion of the bone screw lying on a common plane; and - both the first and the second shape-memory elements of the distal pair lie on a respective offset plane with respect to said common plane on which said transversal passages and holes (13, 14; 23, 24) lie, said first and second shape-memory elements being retained in their corresponding seats by a distal cover fixed to the rod. a cannulated rod extending between a proximal end and a distal end; an outside tubular sleeve for receiving said rod, the rod being coaxial with the sleeve and axially guided inside the tubular sleeve; shape-memory elements housed in corresponding seats of said rod; each of the shape-memory elements able to assume a configuration of rest in which said shape-memory elements are housed in their respective seats to allow the nail to be inserted into the bone, and a configuration of use in which said shape-memory elements are projecting from slots in said sleeve; wherein - a distal pair of said shape-memory elements is provided at the distal end of the rod; and - a first shape-memory element and a second shape-memory element forming the distal pair lie on an offset plane with respect to each other characterized in that - a pair of transversal passages (23, 24) is provided in the proximal portion of said rod and a pair of corresponding transversal holes (13, 14) is provided in the proximal portion of said sleeve, said holes and passages being intended to receive bone screws and having their respective axes for the insertion of the bone screw lying on a common plane; and - both the first and the second shape-memory elements of the distal pair lie on a respective offset plane with respect to said common plane on which said transversal passages and holes (13, 14; 23, 24) lie, said first and second shape-memory elements being retained in their corresponding seats by a distal cover fixed to the rod. - a distal pair of said shape-memory elements is provided at the distal end of the rod; and - a first shape-memory element and a second shape-memory element forming the distal pair lie on an offset plane with respect to each other characterized in that - a pair of transversal passages (23, 24) is provided in the proximal portion of said rod and a pair of corresponding transversal holes (13, 14) is provided in the proximal portion of said sleeve, said holes and passages being intended to receive bone screws and having their respective axes for the insertion of the bone screw lying on a common plane; and - both the first and the second shape-memory elements of the distal pair lie on a respective offset plane with respect to said common plane on which said transversal passages and holes (13, 14; 23, 24) lie, said first and second shape-memory elements being retained in their corresponding seats by a distal cover fixed to the rod.