Flanges (68) are provided on outer sides (in an upper-lower direction) of a pair of narrow side walls (66) of a
crash box (50). Each of flanges (68) is provided to be connected to the narrow side wall (66) at the central portion thereof, and the both lateral portions thereof (wing-like flanges (70a, 70b)) extend parallel to the narrow side walls (66) and in the opposite directions relative to each other. Therefore, even when an
impact load is applied to the
crash box (50) in an oblique direction of the vehicle, owing to disposition of the flanges (68) the crush box (50) is suppressed from lateral falling, so that excellent
impact-absorbing property is stably obtained. Because the flanges (68) are formed parallel to the narrow side walls (66), the
impact absorbing member can be appropriately prevented from the lateral falling resulted from the impact load acting in an oblique direction of the vehicle, and can be compactified in size. As a result, mountability on a vehicle is improved.