An occlusal plane analyzer (5) is composed of an analysis board (7) made of a magnetic material and held above a lower jaw model (2), a magnet (8) which can attract the analysis board (7) with magnetic force and which has a circular support hole (15) going through in an attraction direction of the magnetic force, and a Monson curve imparting tool (9) composed of a spherical body section (17) which is made of a magnetic material with a diameter larger than an inside diameter of the support hole (15) and which can be attracted to the support hole (15), an extended section (18) extending from the spherical body section (17), and a spherical surface regenerating section (19) further extending from a distal end of the extended section (18) for drawing a circular arc concentric with the spherical body section (17).
