To enhance a yield by arranging a tip end of a shape steel such as a bar steel divided by a flying shear in a rolling line by a flat plate type stopper and reducing a cutting of an excess length of the tip end of the shape steel generated at the time when the tip end is cut by a cold shear at a downstream.

A plurality of stopper plates 11 or click rotation having n, e.g. three collision surfaces are provided and collision surfaces are provided such that a first collision surface 28 is parallel to a presumed vertical line 18, i.e., a cutting target of a bar steel 14 at a first rotation angle of the stopper plate 11, a second collision surface 29 is parallel to the presumed vertical line 18, i.e., the cutting target of the bar steel 14 when the stopper is clockwise rotation-clicked, for example, by α° and an n collision surface is parallel to the presumed vertical line 18, i.e., the cutting target of the bar steel 14 at an n click at the time when the stopper is subsequently rotated. A cutting area from the presumed vertical line 18 to the collision surface is separated and determined in n kinds of parallel states and n kinds of cutting length difference are provided at a tip end of the bar steel 14 and the tip end is arranged by adjusting an angle of a plurality of stopper plates corresponding to a pattern of length of the bar steel simultaneously cut.