A location device for locating an entry point of a pedicle of a vertebra intended for being used with an instrument for perforating the pedicle, the location device comprising: an elongate aiming body having two end openings connected to one another by a guiding channel defining an axis for longitudinal guiding of the perforating instrument, the aiming body being extended at one of the ends by a fork overlapping the transverse process supported by the pedicle to perforate, the overlapping fork comprising two extensions defining a receiving area for the transverse process supported by the pedicle to be perforated, the receiving area having a first contact surface, configured to engage with an area at the junction of the transverse process and an articular process associated with the pedicle to be perforated, placed offset relative to the guiding axis.
