PURPOSE: To perform high-precise and automatic work to drill and tap a prepared hole through a single device and to reduce an installation space by independently moving and controlling the top and bottom molds of a punching unit and the drill and the drill guide hole of the tapping unit.

CONSTITUTION: A work clamper 10 is moved in the direction of the X-axis of a base bed 1 and a punching unit 20 and a tapping unit 30 are moved in the direction of the Y-axis of the base bed 1. Further, centering of the punching unit 20 and the tapping unit 30 is performed by means of a stylus unit 40 with high precision and a centering error due to heat is automatically corrected by an automatic position correction control device. As a result, a work to drill a prepared hole in a work W and tap the hole through a single device is effected automatically with high precision and an installation space is sharply reduced.