There is provided a ligament reconstruction type artificial knee joint that can exert a function of an anterior cruciate ligament in an original knee joint.In an artificial knee joint 1 used in a total knee replacement, the artificial knee joint 1 includes: a femur member 10 mounted on a femur distal end DT； a tibia member 20 mounted on a tibia proximal end PE； and an artificial ligament 30 coupling the tibia member 20 and the femur member 10 together. One end of the artificial ligament 30 is coupled to a position where once an anterior cruciate ligament ACL exists in a knee replaced for the artificial knee joint 1 on an inside of a lateral condyle of the femur member 10, and the other end of the artificial ligament 30 is coupled to a position where once the anterior cruciate ligament ACL exists in the knee replaced for the artificial knee joint 1 on an upper side of the tibia member 20.
