The present invention relates to a device 10 for the position of the axis of a transversal fastening hole 14 of a hollow endomedullary nail 12 positioned inside a medullary canal of a bone 5. Said device 10 comprises a flexible detection probe 20 suitable to be axially inserted with a head end 30 inside the endomedullary nail 12 to slide therein. On the head end 30 of said detection probe 20, an alignment or location sensor is placed. Said alignment or location sensor is suitable to signal an alignment condition between the transversal fastening hole 14 of the endomedullary nail 12 and the sensor itself 32. The device 10 further comprises detecting means 40, 50. Said detecting means 40, 50 are connected to the detection probe 20 and they are suitable to provide data on the space position of the head end 30 of the detection probe 20 with respect to a preset reference system. The device 10 also comprises computing means 70 which are suitable to receive data detected by the detecting means 40, 50. On the basis of data received from the detecting means 40, 50 and at the alignment condition signalled by the alignment sensor 32, computing means 70 allow to compute the position coordinates in the space of the axis of the transversal fastening hole 14 of the endomedullary nail 12 with respect to an external reference system. Finally, the present invention relates to an alignment equipment 80 of a drill 104 comprising said position locating device 10 and pointing means 90, comprising themselves a drill guiding device 95. Said pointing means are suitable to align, on the basis of the position coordinates provided by the device 10, a longitudinal axis K of the drill guiding device 95 with the axis of the fastening hole of the endomedullary nail 12.La présente invention concerne un dispositif 10 pour le positionnement de laxe dun trou de fixation transversal 14 dun clou endomédullaire creux 12 positionné à lintérieur dun canal médullaire dun os 5. Ledit dispositif 10 comprend u
