Shock absorber

A shock absorber adapted to support a bumper reinforcing member of a vehicle and absorb by plastic deformation of the shock absorber an impact exerted on the bumper reinforcing member,

• comprising a first collapsible shock absorbing part, and a second shock absorbing part adapted to be compressed in the axial direction thereof inclined outward in the width direction of a vehicle,
• the first shock absorbing part having a structure of a basin-like truncated conical shape and including a skirt-shaped side surface, a top surface surrounded by a smaller-diameter-side circumferential edge of the side surface, an annular flange surface projecting from a larger-diameter-side circumferential edge of the side surface in the radially outward direction, and a bead integrally formed on the side surface in connection between the larger-diameter-side circumferential edge and the smaller-diameter-side circumferential edge, whereby the shock absorber has a function of aligning a direction in which the impact exerted on the bumper reinforcing member with the axial direction of the second shock absorbing part while absorbing the same impact, and
• the second shock absorbing part having a function of absorbing an impact transmitted from the first shock absorbing part.