To provide a method for constructing a press line capable of efficiently discharging a workpiece with the pressing work thereof being completed outside the line when the pressing work of the line is completed only by a part of pressing machines, and performing the workpiece discharging work without evacuating a workpiece carrying-out device outside the line.

A workpiece discharging conveyor 3 for delivering a workpiece W outside a working line is selectively arranged in a workpiece delivery range (installation parts S of lower dies in pressing machines P2-P9) by a rear side conveying robot 6 of a workpiece conveying device 1 according to the work content of the line.