Joint implant with an upper part and a lower implant part (2, 3), which are joined together in an articulated manner forming a joint, and with a longitudinal implant axis (1a), in which the upper part and the part Lower implant (2, 3) respectively have an articulation element (6, 9), which comprises the articulation area, and a support element (5, 8), which can be contacted and supported on the bone respectively oriented towards it, in which the articulation element (6, 9) and the support element (5, 8) of the respective implant part (2, 3) are detachably connected to each other by means of fixing means , in which the two articulation elements (6, 9) of the implant parts (2, 3) have a respective articulation zone (7, 10) and the two articulation zones (7, 10) cooperate with an element intermediate (11) having an upper face and a lower face (12, 13) opposite, as sup supporting surfaces, forming two partial joints, and in which a joining means (4) is provided that joins together the upper part and the lower part of the implant (2, 3) forming a coherent assembly, the position of the connecting means (4) with respect to the upper and lower articulation elements (6, 9), characterized in that the two implant parts (2, 3) can be freely rotated with respect to each other and with respect to the intermediate element ( 11), because the means of fixing the support and articulation elements (5, 8； 6, 9) are configured as means for dragging the shape (35, 36； 37) which, by turning the articulation element (6, 9) and the support element (5, 8) of the implant part ( 2, 3) respectively, they can be fixed or fixed to each other, because the cooperative means of dragging (35, 36； 37) are secured against torsion with respect to each other, in a rotated position, by means for torsion protection (41, 42) and for which the torsion protection means have retention tabs (41).Implante articular con una parte superior y una parte inferior de implante (2, 3), que están unidas entre sí de maner
