PROBLEM TO BE SOLVED: To provide an articulator for gothic arch trace with which data on the horizontal jaw locomotion route or various functional jaw positions of a patient provided by using a gothic arch tracer with a digitizer as an input device can be converted to the horizontal movement route or horizontal position of the articulator while using a personal computer(PC) and can be utilized on the articulator when producing prosthesis or examining a jaw function. SOLUTION: In order to continuously input coordinate signals showing the relative horizontal position relation of the upper jaw and lower jaw parts of the articulator to the PC, in one set of digitizer used for PC and composed of coordinate indicators, sensors and control circuit parts, the coordinate indicator and the sensor are installed while being confronted like the upper jaw and lower jaw on the centers of the upper jaw and lower jaw parts of the articulator, and coordinate signals corresponding to the horizontal motion of the articulator are continuously inputted to the PC by the control circuit part connected with the sensor.
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