An angle adjustment stage device for dental technique comprising: a base; a stage arranged above the base, a workpiece for dental technique adapted to be fixed on the stage; and a stage support mechanism provided on the base tc support the stage in a manner such that a tilt angle of the stage is adjustable, the stage support mechanism including a base shaft arranged in protruding manner on the base and having a magnet therein, and a rocking body magnetically coupled to the tip of the base shaft, the rocking body including a square substrate, a sphere formed from ferromagnet, a sphere holder arranged at the center of the substrate so as to be rotatable around an axis which extends through the center of the substrate and perpendicular to the substrate, and a first stopper for fixing the sphere holder to the substrate at a desired rotational position, the sphere holder holding the sphere in a manner such that the sphere can be rotated around the center thereof and fixed at a desired rotational position while the center of the sphere is on the axis extending perpendicular to the substrate, the rocking body further including a support rod extending radially outward form the sphere and connected to a lower surface of the stage at an upper end thereof, a lower portion of the sphere protruding from the underside of each of the sphere holder and the substrate, the rocking body being magnetically coupled to a receiving portion of the tip of the base shaft at a lower end of the sphere, the stage support mechanism further including an elevating body fitted on the base shaft so as to vertically slide along the base shaft, and a second stopper attached to the elevating body and/or the base shaft for fixing the elevating body to the base shaft at a desired height, wherein an upper surface of the elevating body forms a horizontal plane and has a recess for receiving the lower portion of the sphere, and a through hole is formed on a bottom surface of the recess to reach a lower surface of the elevating body, and the through hole has a diameter corresponding to a diameter of the base shaft so that the base shaft is inserted through the through hole, wherein the rocking body takes a horizontal position when the elevating body is located at the highest point to contact a lower surface of the substrate of the rocking body at an upper surface thereof, while the rocking body takes a tilt position when one of four sides of the substrate is brought into contact with the upper surface of the elevating body after the elevating body is lowered from the highest point while separating the upper surface thereof from the lower surface of the substrate, and wherein the angle adjustment stage device for dental technique further comprises an angle display mechanism displaying a tilt angle at the tilt position of the rocking body depending on the height of the elevating body. a base; a stage arranged above the base, a workpiece for dental technique adapted to be fixed on the stage; and a stage support mechanism provided on the base tc support the stage in a manner such that a tilt angle of the stage is adjustable, the stage support mechanism including a base shaft arranged in protruding manner on the base and having a magnet therein, and a rocking body magnetically coupled to the tip of the base shaft, the rocking body including a square substrate, a sphere formed from ferromagnet, a sphere holder arranged at the center of the substrate so as to be rotatable around an axis which extends through the center of the substrate and perpendicular to the substrate, and a first stopper for fixing the sphere holder to the substrate at a desired rotational position, the sphere holder holding the sphere in a manner such that the sphere can be rotated around the center thereof and fixed at a desired rotational position while the center of the sphere is on the axis extending perpendicular to the substrate, the rocking body further including a support rod extending radially outward form the sphere and connected to a lower surface of the stage at an upper end thereof, a lower portion of the sphere protruding from the underside of each of the sphere holder and the substrate, the rocking body being magnetically coupled to a receiving portion of the tip of the base shaft at a lower end of the sphere, the stage support mechanism further including an elevating body fitted on the base shaft so as to vertically slide along the base shaft, and a second stopper attached to the elevating body and/or the base shaft for fixing the elevating body to the base shaft at a desired height, wherein an upper surface of the elevating body forms a horizontal plane and has a recess for receiving the lower portion of the sphere, and a through hole is formed on a bottom surface of the recess to reach a lower surface of the elevating body, and the through hole has a diameter corresponding to a diameter of the base shaft so that the base shaft is inserted through the through hole, wherein the rocking body takes a horizontal position when the elevating body is located at the highest point to contact a lower surface of the substrate of the rocking body at an upper surface thereof, while the rocking body takes a tilt position when one of four sides of the substrate is brought into contact with the upper surface of the elevating body after the elevating body is lowered from the highest point while separating the upper surface thereof from the lower surface of the substrate, and wherein the angle adjustment stage device for dental technique further comprises an angle display mechanism displaying a tilt angle at the tilt position of the rocking body depending on the height of the elevating body.