摘要： 善意原则不仅是国内法律制度中的一般法律原则，也是国际法律制度中的一般原则。善意原则构成了国际关系交往的基础。联合国宪章和条约法公约都规定了善意守约的原则。国际法院肯定善意原则的地位和作用。世界贸易组织争端解决程序中，善意原则得到了一定程度的适用。善意推定，善意解释条约，善意履行义务，善意行使权利，构成了善意原则的主要内容。但善意原则虽规范世界贸易组织协议，其本身却不能产生独立的义务，也不能替代现有的义务。违约并不等于非善意行事。合理、客观、公正、禁止滥用权利、正当程序等，都在一定程度上体现着善意要求。

关键词: WTO , 争端解决 , 善意原则 , 适用

Abstract: The principle of good faith is not only a general principle of law，but a general principle of international law．The principle of good faith constitutes the basis of international relations，and is set up in the Charter of United Nations and Vienna Treaty Convention．The Court of International Justice affirmed its position and role．The principle of good faith is to some extent applied in WTO dispute settlement．The principle consists mainly of presumption of good faith，interpretation of conventions in good faith，exercise of right in good faith．While regulating the rules of the WTO，the principle of good faith itself doesn’t result in independent obligations，nor can substitute other obligations．Breach of obligation is not amount to not act in good faith．Reasonableness，objectivity，fairness，prohibition of abuse of right，and due process，are the main expression of good faith．

Key words: good faith, application, WTO dispute settlement