The invention relates to a bone screw (10) comprising a body (20) which is elongate along an longitudinal axis (A1) and supports at least one helical thread (30) and, at the rear end of said elongate body, a head (40) which has a recess (41) for receiving the end of a screwing tool. According to the invention, the helical thread has at least one notch (32) the shape of which is such that the joints between the notch and the helical thread form angles, one of which is acute and the other of which is obtuse, the joint forming an obtuse angle being the one located closest to the head.
