The present invention provides an artificial joint which can be rapidly,
securely and easily fixed while being suited to an inner surface of a bone
marrow hole by a novel structure absolutely different from the
conventional one. An artificial joint is provided with a stem base portion
(10) in which a desired head (2) and a desired socket (5) are in slidably
contact with each other in a freely bending manner, stems (9, 16) are
fitly attached to free ends of the head (2) and the socket (5)
respectively, and the respective stems (9, 16) have therein locking screws
(14) freely screwing to move along axial directions thereof, and a pair of
stem pieces (15) having an elasticity provided to protrude on both front
portions of the stem base portion (10), and the locking screws (14) are
forcedly inserted within the stem pieces (15) so as to expand them
outward, thereby making them tightly contact with and fix to inner
surfaces of bone marrow holes (19, 21).
