To provide a novel peptide which has a high self-assembling capability, and percutaneous absorbing materials, cosmetics and agents containing the same.SOLUTION: A peptide comprises a first cyclic material 10 in which the sequence of Phe-Pro-Gly-Val-Gly is repeated 3 or more times, and N terminal and C terminal are bound to each other, or, a second cyclic material in which, with respect to the first cyclic material 10, 40% or less of amino acids are deleted, substituted, or added. There are also provided percutaneous absorbing materials, cosmetics and agents containing the peptide comprising the first cyclic material 10 or second cyclic material.SELECTED DRAWING: Figure 1【課題】高い自己集合能を有するペプチド、それを含有する経皮吸収素材、化粧品及び薬剤を提供する。【解決手段】ペプチドは、Phe-Pro-Gly-Val-Glyの配列が3回以上繰り返され、N末端とC末端が結合した第1の環状物10、又は、第1の環状物10に対して40%以下のアミノ酸が欠失、置換、又は付加された第2の環状物からなる。そして、経皮吸収素材、化粧品及び薬剤は、第1の環状物10又は第2の環状物からなるペプチドを含有する。【選択図】図1
