PURPOSE: To easily, safely and in a short time correct the bends of bar and tube made of a metal.

CONSTITUTION: In the longitudinal direction of a jig main body l, a tapered through-hole 2 whose diameter is successively expanded toward the center part from a tip part is formed. In the center part of the through-hole 2, a screw hole 3 communicating with the outside surface of the jig main body 1 in a direction perpendicular to the through-hole, is formed. And, the jig is constituted so that the screw part 7 of a pressure member 4 with a pressing plate 5 fixed on its lower end and with a handle 6 mounted on its upper part, is screwed down in this screw hole 3.