In this paper, I tried to answer the question, “Do religious factors still serve as an important variable in the elections of Korea?” This is an attempt to examine the relationship between religion and politics in a functionally differentiated modern society. The situation in the last presidential election was analyzed especially through the Herald Economics survey and then complemented by the KGSS(Korean General Social Survey). As a result, religious factors worked as a significant variable independent of age or district, though the effect was not strong. In general, Buddhists have a conservative, Protestants a conservative-centrist, Catholics and Non-religious a liberal political tendency. In addition, I considered the connotations that the religious issues have in the election. As a result, I regarded those factors as not significantly changing the current electoral circumstances, because 1) people view political participation of the religious as negative, 2) those issues were not enough to go through a consensus process even within the confession, 3) they do not have a sufficient importance to change the current political tendency. Finally, I agreed with J. Casanova`s thesis that the most appropriate among the three interaction levels between religion and politics(state, Political society and civil society) is civil society. How strongly the religious issues will influence politics depends upon how strong an empathy is raised within civil society. In conclusion, the possibility of coalitions between the various confessions according to their political tendency was therewith suggested.