An objective of the present invention is to provide an artificial knee joint implant with which it is possible to carry out a more natural pivot motion. An artificial knee joint implant (1) includes a femur component (2) and a tibia plate (4), which make contact with one another. The femur component (2) further includes a first joint face (11) which is positioned in contact with a patients inner side collateral ligament (105), and a second joint face (12) which is positioned in contact with the patients outer side collateral ligament (106). The first joint face (11) and the second joint face (12) respectively further comprise a first pivot guidance unit (46) and a second guidance pivot guidance unit (48). A reference plane (43) which extends orthogonally to the horizontal direction is regulated between the first joint face (11) and the second joint face (12). A reduction quantity (ΔD2) of a distance (D2) between a second contact part (42) at the second pivot guidance unit (48) and the reference plane (43) with the increase of a unit bending angle is set to be greater than a reduction quantity (ΔD1) of a distance (D1) between a first contact part (41) at the first pivot guidance unit (46) and the reference plane (43) with the increase of the unit bending angle.La présente invention a pour but de proposer un implant darticulation de genou artificiel avec lequel il est possible de réaliser un mouvement de pivot plus naturel. Un implant darticulation de genou artificiel (1) comprend un composant fémur (2) et une plaque de tibia (4), qui entrent en contact lun avec lautre. Le composant fémur (2) comprend en outre une première face darticulation (11) qui est positionnée en contact avec un ligament latéral côté intérieur (105) dun patient et une seconde face darticulation (12) qui est positionnée en contact avec le ligament latéral côté extérieur (106) du patient. La première face darticulation (11) et la seconde phase darticulation (12) comprennent en outre respectivement
