Abstract: An articulator with which an upper/lower jaw open condition can be held and released easily, thereby improving an efficiency with which dentistry techniques are practiced, includes: a support member having a rod-shaped support shaft body; an upper jaw side connecting member attached to the support shaft body in an appropriate axial direction position; a lower jaw side connecting member connected rotatably to the upper jaw side connecting member; an upper jaw model attached to the upper jaw side connecting member; and a lower jaw model attached to the lower jaw side connecting member, wherein the lower jaw side connecting member includes a stopper that is fitted and latched to the support shaft body when rotated to a predetermined position.