To ensure prescribed rigidity by maximally suppressing a reduction in rigidity of an upper member even when a cutout part is provided by cutting out a partial side face near a headlamp.

An upper member 16a (16b) is extrusion-molded into an oblong squarish-eight-shaped cross-section having an inner rib 28 composed of a partition wall between the inner wall 22a and the outer wall 22b. The upper member is provided with a cutout part 30 that is formed by cutting out from the outer wall 22b to the inner rib 28 at one end part of the upper member 16a (16b) near a headlamp 32 in a curved line.