To provide a tool part attachable-detachable driver having a simple structure, reduced in manufacturing cost, surely gripping a tool part, and surely performing the attaching-detaching work of a screw.

This tool part attachable-detachable driver is composed of a synthetic resin grip 18, a tool chuck 19 pressed in the grip, and the tool part 15 insertable into and extractable from the tool chuck. The tool chuck has a plurality of gripping pieces 24 for elastically holding the tool part at a tip, and an engaging hole 23 for stopping rotation by fitting the tool part is formed in a base end.