PURPOSE: To provide the method for finishing the shape by pressing the roller while rotating in order to improve the precision of shape roughly machined to the approximate shape with the roller having the tooth shape of gear.

CONSTITUTION: After positioning the center line of the dedendum of a gear 3 to be machined after roughly machined and the center line of a roller having the tooth shape of the above gear to the same center line, the axis of the gear 3 to be machined and the axis of the roller 2 are synchronously rotated at the position preparing for being brought in contact with.