The invention relates to medicine, in particular, traumatology and orthopedics and can be used in treatment of small joints.Substance of proposed utility model consists in the fact, that endoprosthesis of first metatarsophalangeal joint has distal articular cup with pedicle and proximal articulation head with leg.Novelty of endoprosthesis of first metatarsophalangeal joint consists in the fact, that distal articular cup has a shape of cylinder with diameter d1, equal to 14.0 - 20.5 mm, thickness d1, equal to 4.5 - 7.0 mm and spherical cavity depth of 1.7 - 3.1 mm, on sides of distal articular cup has symmetrical side sections are, and lower side has dorsal mark, on rear side of distal articular cup is made fluted surface, leg distal articular cup is displaced downwards relative to center of distal articular cup on 0.5 - 1.5 mm and is made in the form of truncated cone with apex angle 6 degrees, with diameter of upper base g1, equal to 5.4 - 7.2 mm and length l1, equal to 17.0 - 22.0 mm, on pedicle distal articular cup is made 19 - 25 transverse grooves and 4 longitudinal grooves; the proximal articular head is made in the form of the segment radius R, equal to 7.5 - 11.0 mm and thickness of d2, equal to 5.4 - 8.6 mm and is inclined 10 degrees relative to axis of leg, lower side proximal articular head has cut, on rear side of proximal joint head is made fluted surface, leg proximal articular head passes through the center of the back side of proximal joint head and is made in the form of truncated cone with apex angle 6 degrees, diameter upper base g2, equal to 5.1 - 7.2 mm and length l2, equal to 17.0 - 30.0 mm, on pedicle proximal joint head is made 14 - 30 transverse grooves and 4 longitudinal grooves.