The artificial joint of the present invention is provided with a cup having a first housing part that opens on one first-direction side, an insert that is housed in the first housing part and has a second housing part that opens on one first-direction side, a movable member having a spherical head part rotatably housed in the second housing part and a neck part extending from the head part, and a connecting part that connects the insert to the cup pivotably around a pivotal axis extending in a second direction； the neck part contacting an edge part of the insert by pivoting around the pivotal axis； the insert pivoting around the pivotal axis； and part of the opposite side of the side pushed in by the neck part across the pivotal axis protruding from the cup to one first-direction side.
