The invention relates to an intramedullary rod (100) of a long bone, comprising a solid body and at least one fixing opening (4) that can cooperate with a fixing body, said fixing opening (4) having been internally threaded with at least two threads, characterised in that the internal threading is carried out over part of the diameter of the intramedullary rod, the internal threading being laterally surrounded on either side by non-threaded passages.
