试论不当得利的构成要件

Discussion on constitutive condition of improper profit

不当得利制度发源于罗马法诉权,是民法中一项重要内容。构成不当得利有四个条件:必须一方获得利益;必须他方受到损失;必须受利益与受损失之间有因果关系;受益必须没有合法依据。

Improper profit originates from the litigation right of Roman Law, is an important content of the civil law. It has four conditions： one side obtains the profits; other side loses the resources; there is causal relation between the side obtaining the profits and the side losing the resources; profits haven＇t legal basis.