在歐洲法院之生物科技發明案件中引發歐體法與國際法之間的關聯性問題。在一項廢止請求中，荷蘭主張生物科技發明指令不符合國際條約，其中包括WTO架構下的若干多邊協定。在對於這些請求的答覆中，歐洲法院針對GATT與WTO下各個多邊協定的可援引性、其他國際條約，以及在審查歐體行為的合法性時國際習慣法規則的適用等事項，闡明先前的案例法。由於這些闡釋的內容產生先前案例法的部分廢棄，所以本文將沿著這些爭點來討論生物科技發明案。首先本文將概述該案的事實背景及訴訟程序。為了使讀者能全盤瞭解歐洲法院的生物科技發明案的判決，本文亦將簡述歐洲法院針對國際條約法規定的可援引性，以及在審查歐體行為的合法性時討論國際習慣法規則適用上的相關先前案例 法。接著本文將檢視生物科技發明案所涉及爭點的歐洲法院判決文，並且最後本文將歸納幾點生物科技發明案對未來法院判決所可能帶來的影響與寓意，特別是歐盟與WTO之間的關係。

　　In the Biotechnological Inventions case of European Court of Justice, the question of the relationship between European Community law and international law was happened. In an application for annulment, the Netherlands’ fourth plea agued that the Biotechnological Inventions Directive is incompatible with several intemational treaties, especially WTO. In the answers to this c1aim,the ECJ clarified its previous several cases on the invocability of GATT and WTO treaties, on that of other international treaties, and on that of rules of customary international law (CIL), when it reviewed the lawfulness of a Community act. Because these clarifications appeared some reversal of previous case law, then, this article will focus its central discussion upon the Biotechnological inventions case around these issues. In the first place, it will outline the background of this case. In order to gain a thorough understanding of the Court’s judgment in this case, it will also detailedly discuss the ECJ’s previous case law on the invocability of international treaty provisions and on that of rules of CIL to review the lawfulness of a Community act, in particular GATT and WTO rules. Secondly, it will then examine the ECJ’s decision in the matter in the Biotechnological inventions case, and finally it will conclude some points regarding the implications and effects of the Biotechnological inventions case on future decisions of ECJ, particularly the relationship between EU and WTO.