PURPOSE: A bumper beam unit for a vehicle is provided to integrally manufacture a stay and a corner reinforcing bracket and to improve the impact absorbing efficiency by improving the structural rigidity of a corner unit through assembling with an inserting method at both sides of the end of a bumper beam. CONSTITUTION: A bumper beam unit (10) for a vehicle comprises a bumper beam (1) and a stay member (3). The stay member includes upper and lower reinforcing stay panels and a mounting plate (15). The upper and lower reinforcing stay panels individually include a stay unit and a corner reinforcing bracket (13) to mutually assemble. The mounting plate is fixed to the rear end of the stay unit in the upper and lower reinforcing stay panels and is coupled with a front side member.
