摘要： 不当得利制度作为法定之债的一种，在各国民法上占有重要一席。但由于受道德观念的影响，再加上两大法系历史传统的差异，各国不当得利制度在具体内容上的区别相当大。因此，冲突规范在解决涉外不当得利纠纷中就凸现其重要性。本文首先回顾了不当得利制度的发展历程，比较分析了大陆法系国家关于不当得利的各条冲突规则，并在研究英美立法模式对我国参考价值的基础上，提出若干立法建议。

关键词: 不当得利 , 冲突规范 , 原因事实发生地 , 原因关系准据法

Abstract: Unjust enrichment is one of the statutory debts in civil law．The legislation concerned，however，differs from one country to another because of the deep influence by moral ideas in each country and the different characteristics of two legal families．Therefore，the conflict rule plays an important role in foreign—related unjust enrichment cases．Whether the judgment is appropriate depends whether the conflict rule is reasonable or not．The dissertation is about to take a historical view on the legislation concerned in countries belong to different legal families，make comments on each conflict role，then put forward authors’proposal for legislation．

Key words: unjust enrichment, conflict rule, place of unjust factor, law of the relationship