The invention concerns an arthrodesis implant (1) for promoting the osseous fusion of a first bone (2) with a second bone (3), said implant (1) comprising a primary component (4) including a primary anchoring body (5) and a male connector (6), and a secondary component (7) including a secondary anchoring body (8) and a female connector (9), said female connector (9) comprising:a main body (10) which extends longitudinally between a rear end (11) linked to said secondary anchoring body (8) and an opposite front face (12), and which has a lateral wall (14) linking said rear end (11) to said front face (12),a housing (15) formed within said main body (10) and configured to receive said male connector (6) in order to link together said primary (4) and secondary (7) components,said female connector (9) further comprising an opening (18) which is formed in said main body (10), in communication with said housing (15), and which extends continuously on both said front face (12) and said lateral wall (14), and which is sized and configured to enable a lateral introduction of the male connector (6) into said housing (15) via said opening (18), each of said primary (4) and secondary (6) components forming an integral part made in one piece, and said primary (5) and secondary (8) anchoring bodies being respectively designed to ensure the insertion and anchoring of the primary component (4) into the first bone (2), and of the secondary component (7) into the second bone (3), by impaction or by forced wedging.Osteosynthesis surgical implants.