Bumper Reinforcement

Provided is a bumper reinforcement such that the occurrence of cracking and reductions in peak load at the time of a crash are prevented. A long lid (3) for closing the cross-section of a long body (2) is spot-welded to non-quenched portions (17, 18) of the long body (2), and the cross-sectional strength of a bumper reinforcement (1) is the same as that of the entirely quenched long body (2). 本发明提供防止在碰撞时产生破裂以及峰值负载减少的保险杠加强件。封闭长条状主体(2)的剖面的长条状盖材(3)被点焊于长条状主体(2)的非淬火部位(17、18)，保险杠加强件(1)的剖面耐力与整体被淬火的情况下的长条状主体(2)的剖面耐力相同。