PROBLEM TO BE SOLVED: To provide a cosmetic composition, particularly a cosmetic composition for human face or body skin, lips, or outer skin, for example, hair, eyelashes, eye brows and or for making up nails and for caring, and provide a novel volatile solvent.SOLUTION: In particular, the main subject of this invention is a cosmetic composition including at least one of ester corresponding to the following formula (I) R1COOR2 (I) (wherein R1 is H atom, or a straight or branched chain, R2 is a straight or branched hydrocarbon wherein -R2 is a straight hydrocarbon base, when R1 is H or straight hydrocarbon base, 7&leR1+R2&le8 and at least one of -R1 and R2 is a branched hydrocarbon base, 8&leR1+R2&le10 wherein, when the R1 is tert-butyl, R2 is not isohexyl).COPYRIGHT: (C)2008,JPO&INPIT【課題】新規な揮発性溶媒の提供。【解決手段】とりわけ本発明の主題は、生理学的に許容可能な媒体中に、下式(I)に対応する少なくとも一つのエステルを含む化粧品組成物である:R1COOR2 (I)[式中、R1は水素原子H、または直鎖状若しくは分枝状の炭化水素ベースの基を表し、R2は直鎖状若しくは分枝状の炭化水素ベースの基を表し、但し-R2が直鎖状炭化水素ベースの基であり、R1がHまたは直鎖状炭化水素ベースの基である場合、7≦R1+R2≦8であり;及び-R1とR2の少なくとも一方が分枝状炭化水素ベースの基である場合、8≦R1+R2≦10であり但しR1がtert-ブチルである場合、R2はイソヘキシルではない]。【選択図】なし