PURPOSE: To absorb any inclination of a screw to a part and perform a screwing work automatically with no trouble even if a screw is relatively inclined to a commodity being screwed when an automatic driver is operated by an automatic assembly machine.

CONSTITUTION: An automatic driver is provided with an absorbing lip 8 for sucking a screw 14, and a lip holder portion 9 for positioning the sucking lip 8 in a specific position as well as elastically holding the sucking rip 8 to be capable of rising and setting in the axial direction of the housing main body 1 of the automatic driver; A bit 4 for screwing the screw 14 exists inside the lip holder portion 9, and a clearance portion 13 is provided in the lip holder portion, for which allowing the sucking lip 8 to rock in the radial direction when the sucking lip 8 is set in the lip holder portion.