The intramedullary nail (1) has a longitudinal axis (2), a proximal end (3), adistalend (4), at least one hole (10, 11) that extends transversely to thelongitudinalaxis (2) and is situated in a plane (20) with a defined diameter (d10, d11) toaccommodate a locking element (12, 13), as well as a longitudinal slot (9)extending in the plane (20) parallel to the longitudinal axis (2). In theunexpandedstate of the intramedullary nail (1) the longitudinal slot (9) has a width b,measured perpendicularly to the plane (20) in the region outside of the holes(10,11), said slot being maximum 0.6 times that of the smallest defined diameter(d10) of the holes (10, 11).