Providing a gel having a gelling agent consisting of an aliphatic oxy glycyl polyol capable of forming a gel in a small amount in the liquid of the alkaline range from problems acidic, biodegradability and environmental and high biocompatibility as well. [MEANS FOR SOLVING PROBLEMS] formula (1): (Wherein, R. Representing an unsaturated aliphatic group having 20 to 18 carbon atoms atoms with one double bond or a saturated aliphatic group having 20 to 18 carbon atoms atoms) aliphatic Okishiguri represented by Self-assembly formed gelling agent characterized in that it consists usable salts thereof or a pharmaceutically sill polyols, by self-assembly of the gelator, and water self-assembly or the gelling agent , alcohol, aqueous solution, alcohol solution, gel consisting of hydrophobic organic solution or hydrophilic organic solution. None [Selection Figure]【課題】酸性からアルカリ性の液性範囲において少量でゲルを形成できる脂肪族オキシグリシルポリオールからなるゲル化剤、並びに高い環境・生体適合性及び生分解性を有するゲルの提供。【解決手段】式(1):(式中、Rは炭素原子数18乃至20の飽和脂肪族基又は1個の二重結合を持つ炭素原子数18乃至20の不飽和脂肪族基を表す。)で表される脂肪族オキシグリシルポリオール又はその薬学的に使用可能な塩から成る事を特徴とするゲル化剤、該ゲル化剤の自己集合化により形成される自己集合体、及び、該ゲル化剤又は自己集合体と水、アルコール、水溶液、アルコール溶液、親水性有機溶液又は疎水性有機溶液より成るゲル。【選択図】 なし
