Conflicts among religious groups are a potential source of social issue, since religious plurarity is prevalent in Korea. Identifying the stereotypes among the three largest religious groups would be helpful to improve religious harmony in Korea. Five hundred and sixty five respondants were sampled and asked to choose stereotypic merits and demerits of Protestants, Buddists, and Catholics from given 32 religious relevant traits. Protestants' merits were chosen as solidarity, devoted, active, sociable, and sincere and their demerits were chosen as demanding, clamorous, exclusive, and weak traditional. Buddist's merits were chosen as quite, generous, picious, and traditional and their demerits were chosen as conservative, weak solidarity, passive, idolatrous. Catholics' merits were chosen as quite, picious, peaceful, devoted, and frugal and their demerits were chosen as conservative, passive, political, and obstinate. Other related questions such as religious consitency between family, forecasting of three religious power in 10 years, and religious activity were also discussed.