FIELD : medicine.SUBSTANCE : invention can be used in the field of composite materials for the manufacture of endoprostheses used in orthopedics to replace the affected natural human joints. Hip joint endoprosthesis, knee joint endoprosthesis, elbow joint endoprosthesis, finger joint endoprosthesis, contain elements made of composite material for bone tissue replacement, containing a porous matrix of crystalline carbon fibers with an interlayer distance of 3.58…3.62 angstroms, with a total amount of fiber 20…80?% and filler material, consisting of crystalline carbon with an interlayer distance of 3.42…3.44 angstroms in the amount of 50…70?%, and amorphous carbon in the form of coke in the amount of 10…20?% of the total pore volume. Carbon nanotubes are introduced into amorphous carbon in the amount of 0.05…1.0?% of the mass of amorphous carbon.EFFECT : invention allows to increase the strength of the implant to the values equal to or higher than the maximum strength of human bone tissue.12 cl