To provide a novel moisturizing base which is a gel-like base material excellent in moisture retention and which can be developed also on a stick-like base material and the like.A lipid peptide type compound comprising at least one of a compound represented by the following formula (1) and an analogue thereof or a pharmaceutically usable salt thereof, a surfactant, a specific polyhydric alcohol, A moisturizing base material containing a fatty acid and water.Embedded image (Wherein R1Represents an aliphatic group having 9 to 23 carbon atoms, and R2Represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms which may have a branched chain of 1 or 2 carbon atoms, and R3Is-(CH2)n-X group, n represents a number of 1 to 4, X represents an amino group, a guanidino group,-CONH2Group, or a 5-membered or 6-membered ring group having 1 to 3 nitrogen atoms or a condensed heterocyclic group composed of 5-membered ring and 6-membered ring. )(FIG.【課題】保湿性に優れるゲル状基材であり、またスティック状の基材等にも展開できる新規な保湿基材を提供すること。【解決手段】下記式（１）で表される化合物及びその類似化合物又はそれらの薬学的に使用可能な塩のうちの少なくとも一種からなる脂質ペプチド型化合物、界面活性剤、特定の多価アルコール、脂肪酸及び水を含む保湿基材。【化１】（式中、Ｒ１は炭素原子数９乃至２３の脂肪族基を表し、Ｒ２は水素原子、又は炭素原子数１若しくは２の分枝鎖を有し得る炭素原子数１乃至４のアルキル基を表し、Ｒ３は－（ＣＨ２）ｎ－Ｘ基を表し、ｎは１乃至４の数を表し、Ｘはアミノ基、グアニジノ基、－ＣＯＮＨ２基、又は窒素原子を１乃至３個有し得る５員環基若しくは６員環基又は５員環と６員環から構成される縮合複素環基を表す。）【選択図】図２
