A compound represented by the following Chemical Formula 4 or any one of following the Chemical Formulas 1-208 to 1-213, 1-217 to 1-219, 1-221 to 1-231, 1-233 and 1-234: Chemical Formula 1-208 Chemical Formula 1-209 Chemical Formula 1-210 Chemical Formula 1-211 Chemical Formula 1-212 Chemical Formula 1-213 Chemical Formula 1-217 Chemical Formula 1-218 Chemical Formula 1-219 Chemical Formula 1-221 Chemical Formula 1-222 Chemical Formula 1-223 Chemical Formula 1-224 Chemical Formula 1-225 Chemical Formula 1-226 Chemical Formula 1-227 Chemical Formula 1-228 Chemical Formula 1-229 Chemical Formula 1-230 Chemical Formula 1-231 Chemical Formula 1-233 Chemical Formula 1-234 in Chemical Formula 4, Z 1 to Z 5 are the same as or different from each other, and are each independently CR 5 or N, in the case where at least two of Z 1 to Z 5 are CR 5, R 5 s are the same as or different from each other, Y 11 to Y 15 and Y 21 to Y 25 are the same as or different from each other, and are each independently CR 6 or N, in the case where at least two of Y 11 to Y 15 and Y 21 to Y 25 are CR 6, R 6 s are the same as or different from each other, but one of Y 11 to Y 15 and one of Y 21 to Y 25 are carbon atoms bonded to an adjacent carbazole group, X 11 to X 15 and X 21 to X 25 are the same as or different from each other, and are each independently CR 7 or N, herein, R 7 is hydrogen; an alkyl group; or an aryl group unsubstituted or substituted by an alkyl group, in the case where at least two of X 11 to X 15 and X 21 to X 25 are CR 7, R 7 s are the same as or different from each other, X 1 is N or CR 11, X 2 is N or CR 12, X 3 is N or CR 13, R 1 to R 6 and R 11 to R 13 are the same as or different from each other, and are each independently hydrogen; deuterium; a halogen group; a nitrile group; a nitro group; a hydroxy group; a carbonyl group; an ester group; an imide group; an amide group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted aryloxy group; a substituted or unsubstituted alkylthioxy group; a substituted or unsubstituted arylthioxy group; a substituted or unsubstituted alkylsulfoxy group; a substituted or unsubstituted arylsulfoxy group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted boron group; a substituted or unsubstituted arylphosphine group; a substituted or unsubstituted phosphine oxide group; a substituted or unsubstituted aryl group; a substituted or unsubstituted fluorenyl group; or a substituted or unsubstituted aromatic or aliphatic heterocyclic group including one or more of N, O, and S atoms, a and c are each an integer of 0 to 4, b and d are each an integer of 0 to 3, in the case where a is 2 or more, R 1 s are the same as or different from each other, in the case where b is 2 or more, R 2 s are the same as or different from each other, in the case where c is 2 or more, R 3 s are the same as or different from each other, and in the case where d is 2 or more, R 4 s are the same as or different from each other. Z 1 to Z 5 are the same as or different from each other, and are each independently CR 5 or N, in the case where at least two of Z 1 to Z 5 are CR 5, R 5 s are the same as or different from each other, Y 11 to Y 15 and Y 21 to Y 25 are the same as or different from each other, and are each independently CR 6 or N, in the case where at least two of Y 11 to Y 15 and Y 21 to Y 25 are CR 6, R 6 s are the same as or different from each other, but one of Y 11 to Y 15 and one of Y 21 to Y 25 are carbon atoms bonded to an adjacent carbazole group, X 11 to X 15 and X 21 to X 25 are the same as or different from each other, and are each independently CR 7 or N, herein, R 7 is hydrogen; an alkyl group; or an aryl group unsubstituted or substituted by an alkyl group, in the case where at least two of X 11 to X 15 and X 21 to X 25 are CR 7, R 7 s are the same as or different from each other, X 1 is N or CR 11, X 2 is N or CR 12, X 3 is N or CR 13, R 1 to R 6 and R 11 to R 13 are the same as or different from each other, and are each independently hydrogen; deuterium; a halogen group; a nitrile group; a nitro group; a hydroxy group; a carbonyl group; an ester group; an imide group; an amide group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted aryloxy group; a substituted or unsubstituted alkylthioxy group; a substituted or unsubstituted arylthioxy group; a substituted or unsubstituted alkylsulfoxy group; a substituted or unsubstituted arylsulfoxy group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted boron group; a substituted or unsubstituted arylphosphine group; a substituted or unsubstituted phosphine oxide group; a substituted or unsubstituted aryl group; a substituted or unsubstituted fluorenyl group; or a substituted or unsubstituted aromatic or aliphatic heterocyclic group including one or more of N, O, and S atoms, a and c are each an integer of 0 to 4, b and d are each an integer of 0 to 3, in the case where a is 2 or more, R 1 s are the same as or different from each other, in the case where b is 2 or more, R 2 s are the same as or different from each other, in the case where c is 2 or more, R 3 s are the same as or different from each other, and in the case where d is 2 or more, R 4 s are the same as or different from each other.