Provided is an artificial joint capable of sufficiently suppressing dislocation while securing a joint movement range. One aspect of the artificial joint of the present invention includes a cup having a first accommodating portion opened to one side in the first direction, and a second accommodating portion opened to one side in the first direction, and is accommodated in the first accommodating portion And a movable member having a spherical bone head rotatably received in the second housing portion and a neck portion extending from the bone head, and the insert being pivotable about a rotation axis extending in the second direction A coupling portion coupled to the cup and restricting movement of the insert relative to the cup in the first direction, the neck portion being in contact with the edge portion of the insert by pivoting around a pivot axis A part of the insert is pushed into the first housing part, and the insert is turned about the rotation axis by the part being pushed in by the neck part, sandwiching the side pushed in by the neck part and the rotation axis The opposite part is first than the cup Wherein the pushed out to the direction one side.関節可動域を確保しつつ、脱臼を十分に抑制できる人工関節を提供する。本発明の人工関節の一つの態様は、第１方向一方側に開口する第１収容部を有するカップと、第１方向一方側に開口する第２収容部を有し、第１収容部内に収容されるインサートと、第２収容部内に回転可能に収容される球状の骨頭部、および骨頭部から延びるネック部を有する可動部材と、インサートを第２方向に延びる回動軸周りに回動可能にカップに連結し、カップに対するインサートの第１方向一方側への移動を規制する連結部と、を備え、ネック部は、回動軸周りに回動することで、インサートの縁部に接触して、インサートの一部を第１収容部内に押し込み、インサートは、ネック部によって一部が押し込まれることで、回動軸周りに回動し、ネック部によって押し込まれた側と回動軸を挟んで反対側の部分がカップよりも第１方向一方側にせり出すことを特徴とする。
