The invention relates to a bone anchoring element (9) for fixing bone parts to another implant, comprising A) a longitudinal cylindrical anchoring part (1) having a longitudinal axis (2), an upper end (3) and a lower end (4); and B) a connecting element (5) which is fixed to the upper end (3) and designed to be coupled to another implantable element; where C) the outer surface (6) of the anchoring part (1) is provided with an external thread (7); D) the anchoring part (1) has a height H in the direction of the longitudinal axis (2) and is provided with a hole (10) which is concentric in relation to said longitudinal axis (2) and measured from the lower end (4) has a depth T; and E) the anchoring part (1) is configured self-cutting at the lower end (4). The invention also relates to a bone fixing device comprising a) two bone anchoring elements (9); b) at least one plate (14; 15) with a central axis (16), said at least one plate (14; 15) being provided with means (17) for receiving connecting elements (5) of the two bone anchoring elements (9); and c) means (18) for fixing the bone anchoring elements (9) in the plates (14; 15), where d) the two bone anchoring elements (9) can be displaced in the direction of the central axis (16).