To provide an occlusal plane table device of an articulator which is easy in fine regulation of the height position of an occlusal plane table and is capable of finely adjusting the occlusal plane table in a horizontal direction even after mounting at the articulator.

The occlusal plane table device 4 has an inner helicoid 405 which is inscribed with helicoid threads 405a on its outer peripheral surface and supports the occlusal plane table 401, a pedestal plate 408 which carries the inner helicoid 405 so as not to rotate the same but to make the same vertically movable along the central axis, an outer helicoid 406 which is inscribed with helicoid threads 406a to be screwed to the helicoid threads 405 on its inner peripheral surface and is mounted on the pedestal cover 409 so as to be made turnable in a prescribed angle range, a cover 407 which is capable of hermetically covering the screwing parts of the helicoid threads 405a and 406a over the entire circumference thereof and guide rails which are mounted detachably on the mandibular model arch 3 of the articulator and movably guides the pedestal plate 408.