The present invention provides a PS-type artificial knee joint implant, with which the gap balance can be adjusted in order to realize a stable deep flexion movement, the burden on a surgeon and a patient can be reduced, and the patient can perform a natural flexion movement. An artificial knee joint implant 1 includes femoral components, one of which is selected and attached to a distal portion of a femur of the patient, and tibial inserts, one of which is selected and attached to a proximal portion of a tibia of the patient. The femoral components have a cam portion that is disposed between posterior portions of two femoral joint faces, respectively. The tibial inserts have posts that can be brought into contact with the cam portion. The posts have different antero-posterior positions.
