To provide a metallic member with a bent flange which can secure a bent flange at least 1.5 times as high as the present member and still does not cause a fracture, neither changing the size of an inner radius R beyond a processing limit of the bending flange norchanging the thickness of the metallic member.

For the metallic member 1 with the bending flange 2 including a shape of adjoining curved part and straight part, the bending flange die is so structured that the thickness of a part 3 of the bending flange 2 is made thinner than the other part.