FIELD: medicine.SUBSTANCE: prosthesis part for the knee joint prosthesis contains a conical protrusion for connecting to an additional prosthesis part, having a complementary conical bore, and two recesses, which, to achieve locking of the rotation of the conical connection for positioning the tongues of the other part of the prosthesis, can be engaged. Conical projection has a side recess for engaging the locking element, and a detail of the prosthesis with a conical projection comprises a detachable nozzle for a conical projection, having a side recess for engaging the locking member. Knee joint prosthesis comprises the above part of the prosthesis with a conical projection, a detail of the prosthesis with a complementary tapered bore and a locking element. Another part of the prosthesis with a conical opening has a through hole for passing the locking element, so that the locking element with a side recess of the detachable nozzle for the conical projection of the part of the prosthesis, inserted in the prosthesis part with the conical opening, meshes with a conical projection. Locking element is a screw without a head, the length of which is selected in such a way, so that, in the absence of a removable nozzle for a conical protuberance or a part of a prosthesis with a conical protuberance, it could come from a through hole to pass the locking element into the prosthesis part with a conical opening. Set of the knee joint prosthesis comprises a first part of the above prosthesis with a conical projection, the second and the third details of the prosthesis with corresponding complementary cone-shaped holes. Second part of the prosthesis has a through hole for passing the stop element, so that the locking element is engaged with the side recess of the removable attachment for the conical projection of the first part of the prosthesis, inserted into the second part of the prosthesis. Third part of the prosthesis has a through hole for passing the stop element, so th
