IMPACT ABSORPTION STRUCTURE

To improve work efficiency related to the manufacturing of an impact absorption structure, and furthermore to suppress an increase of the size of the impact absorption structure.SOLUTION: A fiber structure 20 is an integrated fabric 21, and comprises a plurality of polygonal and cylindrical cells 22. The plurality of cells 22 are constituted of a center cell 23 located in a center of a structure cross section, and a plurality of peripheral cells 24 located at the structure cross section while surrounding the center cell 23. The center cell 23 and the plurality of peripheral cells 24 comprise fiber layers 30 in which threads 31 parallel to axial lines L of the plurality of cells 22 are aligned in a plurality of pieces in a side direction Y. The fiber layers 30 are laminated in a plurality of pieces in a lamination direction Z at least at a part of a side 26. When denoting the side 26 possessed by the cells 22 in common as a first side 26a, and denoting the side 26 not possessed by the cells 22 in common as a second side 26b, a lamination number of the fiber layers 30 located at least at a part of the second side 26b is larger than a lamination number of the fiber layers 30 located at the first side 26a.SELECTED DRAWING: Figure 2 【課題】衝撃吸収構造体の製造に係る作業効率を向上させつつ、衝撃吸収構造体の大型化を抑制できる。【解決手段】繊維構造体２０は、一体織物２１であり、且つ多角筒状のセル２２を複数備える。複数のセル２２は、構造体断面の中央に位置する中央セル２３と、構造体断面において中央セル２３を囲んで位置する複数の周囲セル２４と、から構成される。中央セル２３及び複数の周囲セル２４は、複数のセル２２の軸線Ｌに対して平行な糸３１が、辺方向Ｙに複数配列されてなる繊維層３０を備える。繊維層３０は、辺２６の少なくとも一部において、積層方向Ｚに複数積層されている。セル２２同士で共有される辺２６を第１辺２６ａといい、セル２２同士で共有されない辺２６を第２辺２６ｂというとき、第２辺２６ｂの少なくとも一部に位置する繊維層３０の積層数は、第１辺２６ａに位置する繊維層３０の積層数よりも多い。【選択図】図２