This invention is intended to stably exhibit a shock absorbing performance. A cask buffer body 6 includes a first shock absorber B1 that is obtained by combining a plurality of shock absorber blocks so that a fiber direction is parallel to a shock input direction, that absorbs a shock in a direction parallel to an end surface 1tp of a cask, and that consists of a first material, second to the fourth shock absorbers B2 to B4 that consist of a second material lower in compressive strength than the first material, and that absorb the shock in a direction orthogonal to the end surface 1tp of the cask, and fifth to eighth shock absorbers B5 to B8 that consist of a third material lower in compressive strength than the second material, and that absorbs the shock in the direction orthogonal to the end surface 1tp of the cask. A plurality of holes is provided at least on the first shock absorber B.