The present invention relates to an adhesion preventive agent containing an amphiphilic compound represented by the following general formula (I). (In the formula, X and Y each represents a hydrogen atom or together represent an oxygen atom, n represents an integer of 0 to 2, m represents 1 or 2, and represents a single bond or a double bond. R represents a hydrophilic group having two or more hydroxyl groups)本発明は、下記一般式（Ｉ）で表される両親媒性化合物を含有する、癒着防止剤に関する。（式中、Ｘ及びＹはそれぞれ水素原子を表すか又は一緒になって酸素原子を表し、ｎは０～２の整数を表し、ｍは１又は２を表し、は一重結合又は２重結合を表し、Ｒは２つ以上の水酸基を有する親水性基を表す）
