To continuously perform rough and finish machining, by continuing to the rough machining, mounting a finish machining broach replaced with a rough machining broach in a pull head, and performing the finish machining.

A broach clamp device 27 is lifted, a rough machining broach 30b is extracted from a pull head 16. A finish machining broach transfer feeder 22 is actuated, to be moved to a position A, the broach clamp device 27 is lowered down, a finish machining broach 30a is set. A hydraulic cylinder is actuated in a direction shortening a cylinder rod, a table 15 is lifted, finish machining of a rough machined workpiece 20 is performed with the finish machining broach 30a by lifting the table 15.