SHOCK-ABSORBING MEMBER

摘要

An impact-absorbing member according to the present invention includes a tubular body having a polygonal shape in cross-section perpendicular to a longitudinal direction of the tubular body, the tubular body including: plural flat portions; and plural corner portions provided between the flat portions, in which at least one of the plural flat portions has a thermally-treated portion formed by applying a thermal treatment with a laser light so as to deform at an angle of not less than 0.1 degrees and not more than 3.0 degrees.