A condensed cyclic compound represented by the following Formula 1: wherein in Formula 1, X is a direct linkage, O, S, NR 5, or SiR 6 R 7, each of Ar 1 and Ar 2 is independently a substituted or unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, each of R 1 and R 2 is independently a substituted or unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, each of a and b is independently an integer of 0 to 4, each of R 5, R 6, and R 7 is independently a substituted or unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, the substituted ones are substituted with a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, an unsubstituted alkyl group having 1 to 40 carbon atoms, an unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, an unsubstituted dibenzofuranyl group, an unsubstituted dibenzothiophenyl group, an unsubstituted carbazolyl group, and an unsubstituted pyridinyl group, and one of Ar 1, R 1 or R 2 is represented by the following Formula 2 wherein in Formula 2, L is a direct linkage or a substituted or unsubstituted arylene group having 6 to 40 carbon atoms for forming a ring, and each of R 3 and R 4 is independently a substituted or unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 40 carbon atoms for forming a ring, and the substituted ones are substituted with a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, an unsubstituted cycloalkyl group having 3 to 40 carbon atoms for forming a ring, an unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, an unsubstituted dibenzofuranyl group, an unsubstituted dibenzothiophenyl group, an unsubstituted carbazolyl group, and an unsubstituted pyridinyl group. X is a direct linkage, O, S, NR 5, or SiR 6 R 7, each of Ar 1 and Ar 2 is independently a substituted or unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, each of R 1 and R 2 is independently a substituted or unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, each of a and b is independently an integer of 0 to 4, each of R 5, R 6, and R 7 is independently a substituted or unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, the substituted ones are substituted with a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, an unsubstituted alkyl group having 1 to 40 carbon atoms, an unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, an unsubstituted dibenzofuranyl group, an unsubstituted dibenzothiophenyl group, an unsubstituted carbazolyl group, and an unsubstituted pyridinyl group, and one of Ar 1, R 1 or R 2 is represented by the following Formula 2 wherein in Formula 2, L is a direct linkage or a substituted or unsubstituted arylene group having 6 to 40 carbon atoms for forming a ring, and each of R 3 and R 4 is independently a substituted or unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 40 carbon atoms for forming a ring, and the substituted ones are substituted with a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, an unsubstituted cycloalkyl group having 3 to 40 carbon atoms for forming a ring, an unsubstituted aryl group having 6 to 40 carbon atoms for forming a ring, an unsubstituted dibenzofuranyl group, an unsubstituted dibenzothiophenyl group, an unsubstituted carbazolyl group, and an unsubstituted pyridinyl group.