地中海島嶼賽普勒斯，於1960年脫離英國統治，建立賽普勒斯共和國。島上兩大族裔－希臘裔與土耳其裔居民，長久以來對於生存權力之競奪，導致國內動亂不斷。1974年，賽普勒斯發生憲政危機，土耳其派兵佔領賽島北部36.4%之領土，賽普勒斯遂成為分裂國家。 1990年，賽普勒斯向歐盟提出入會申請。賽普勒斯入會案，為其本身之政治分裂問題、聯合國調停行動，以及土耳其、希臘、歐盟三方關係，投下新的變數。在歐盟第五波擴大的十個新會員國當中，賽普勒斯之政治情況最為特殊，所牽涉之議題最為廣泛。本文旨在研究賽普勒斯加入歐盟之過程，並分析其動機、影響其入會過程之變數、以及入會後所產生之影響。 / As a small island located in the East Mediterranean, Cyprus decolonized from British domination in 1960. It was named The Republic of Cyprus. The perennial political distemper in the country is derived from contending for political powers and living resources between the two main ethnic groups – the Greek and Turkish Cypriots. In 1974, after the constitutional crisis of Cyprus, the Turkish army invaded the northern part of the country and occupied 36.4% of its territory. Thereupon Cyprus became a divided country. In 1990, the Cyprus government applied to the European Union for membership. Cyprus’ application for EU membership had unprecedented effects on Cyprus’ political problem, particularly for UN mediation in Cyprus and the tripartite relationship between Greece, Turkey and the EU. Compared to the nine new member states that joined the EU in 2004, Cyprus is in the most complicated political situation. This thesis focuses on Cyprus’ accession to the EU. The author analyzes Cyprus’ motivation for its application for EU membership, variables which affect its accessing process and the effects after joining the EU.