An articulator comprising: a lower jaw fixing member to mount a lower jaw model thereon; and an upper jaw fixing member to mount an upper jaw model thereon, wherein the lower and upper jaw fixing members (10, 20) have a locking member and a hinge shaft, respectively, such that the lower and upper jaw fixing members (10, 20) are axially coupled with each other, columns (12, 22) formed at rear portions of the lower and upper jaw fixing members (10, 20) have the same length, such that the hinge shaft is positioned on a line extending from an occlusal plane (α), thereby operating the lower and upper fixing members (10, 20) vertically symmetrically to each other about the hinge shaft, and a tangential line (β) of a rotation movement is perpendicular to the occlusal plane (α) if the lower jaw model is vertically folded with the upper jaw model about the hinge shaft, wherein the locking member is provided therein with a groove opened backward in a substantially C shape, the hinge shaft protrudes from both sides of a shaft provided at a lower end of the column the upper jaw fixing member is axially coupled with a rear portion of the lower jaw fixing member, and a support unit is formed in a suspension member connecting left and right upper ends of the column of the lower jaw fixing member to perform an elastic operation, and presses a rear portion of the shaft while maintaining the axially coupling state of the lower jaw fixing member and the upper jaw fixing member, characterized in that the support unit has a protrusion wall protruding upward from a top surface of the suspension member such that a push bar is inserted into a trough hole of the protrusion wall, and a compressive spring is interposed between a head of the push bar and the protrusion wall to press the push bar forwarded while the lower jaw fixing member is detached from the upper jaw fixing member and the groove of the locking member is inclined backward at an angle of -2° such that the upper jaw fixing member more approximately moves to a physiological occlusal state of teeth when the upper jaw fixing member is twisted left or right, to more accurately perform occlusal measurement. a lower jaw fixing member to mount a lower jaw model thereon; and an upper jaw fixing member to mount an upper jaw model thereon, wherein the lower and upper jaw fixing members (10, 20) have a locking member and a hinge shaft, respectively, such that the lower and upper jaw fixing members (10, 20) are axially coupled with each other, columns (12, 22) formed at rear portions of the lower and upper jaw fixing members (10, 20) have the same length, such that the hinge shaft is positioned on a line extending from an occlusal plane (α), thereby operating the lower and upper fixing members (10, 20) vertically symmetrically to each other about the hinge shaft, and a tangential line (β) of a rotation movement is perpendicular to the occlusal plane (α) if the lower jaw model is vertically folded with the upper jaw model about the hinge shaft, wherein the locking member is provided therein with a groove opened backward in a substantially C shape, the hinge shaft protrudes from both sides of a shaft provided at a lower end of the column the upper jaw fixing member is axially coupled with a rear portion of the lower jaw fixing member, and a support unit is formed in a suspension member connecting left and right upper ends of the column of the lower jaw fixing member to perform an elastic operation, and presses a rear portion of the shaft while maintaining the axially coupling state of the lower jaw fixing member and the upper jaw fixing member,