PROBLEM TO BE SOLVED: To provide a solubilizer which is obtained by using polyglycerol fatty acid ester and can be utilized for foods, pharmaceuticals, and cosmetics, and minutely disperses oil soluble matter into an aqueous phase without using a special emulsifier or the like, and can provide a solubilized composition having high transparency, and to provide foods, pharmaceuticals, or cosmetics obtained by using the solubilizer.SOLUTION: The solubilizer is provided which is composed of polyglycerol fatty acid ester comprising: a fatty acid obtained by mixing (A) at least one or more kinds of fatty acids with a carbon number selected from 6-11 and (B) at least one or more kinds of fatty acids with a carbon number selected from 12-22 at a mole fraction of the range of (A)/(B)=0.1/0.9-0.9/0.1 and polyglycerin having an average polymerization degrees of 5-20. The foods, the pharmaceuticals, or cosmetic preparation obtained by using the solubilizer are also provided.COPYRIGHT: (C)2015,JPO&INPIT【課題】ポリグリセリン脂肪酸エステルを用い、食品、医薬品、化粧品に利用することができる可溶化剤であって、特殊な乳化機等用いることなく、油溶性物質を水相中に微細に分散し、透明性が高い可溶化組成物を得ることができる可溶化剤、及びこの可溶化剤を利用した食品、医薬品または化粧品を提供する。【解決手段】炭素数6~11から選択される一種以上の脂肪酸(A)と、炭素数12~22から選択される一種以上の脂肪酸(B)とを、モル比率で、(A)/(B)=0.1/0.9~0.9/0.1の範囲の混合物とした脂肪酸と、平均重合度が5~20であるポリグリセリンとから構成されるポリグリセリン脂肪酸エステルからなる可溶化剤及び、この可溶化剤を利用した食品、医薬品または化粧料。【選択図】なし