This study reviews the existing discourses on church disunity of the Korean Presbyterian Churches. It aims to examine the structure and logic of the discourses rather than criticising the discourses themselves. In doing so, it first accepts the existing discourses as such through suspension of judgment, and then clarifies the limitation of the discourses and suggests the feasible, if any, solutions. In the existing discourses on church disunity, it is said that the following issues are most important for each groups: the discipline issue for the Presbyterian Church in Korea, Koshin (Koshin group), the issue of the doctrine of the Bible for the Presbyterian Church of the Republic of Korea (PROK, Kijang group), the issue of the ecumenical movement for the Presbyterian Church in Korea (Hapdong group), and the personality issue for the Presbyterian Church of Korea (Tonghap group). Although different Korean Presbyterian denominations delivered their own discourses on church disunity, we came to notice the discrepancy between their argument and the reality of the churches when examining their church history. Such discrepancy, however, strongly suggests that in the Korean Presbyterian Churches there can be possibilities to change the course of history. As the Early Church took the opportunity for unity and development, facing church disunity, the Korean Church, particularly the Korean Presbyterian Churches, is expected to do the same.