A heterocyclic compound represented by the following Chemical Formula 1: wherein, in Chemical Formula 1, R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted C1 to C60 alkyl group; or a substituted or unsubstituted C6 to C60 aryl group; or groups adjacent to each other bond to each other to form a substituted or unsubstituted C6 to C60 aromatic hydrocarbon ring or a substituted or unsubstituted C2 to C60 heteroring; L1 is a direct bond; a substituted or unsubstituted C6 to C60 arylene group; or a substituted or unsubstituted C2 to C60 heteroarylene group; X1 to X3 are the same as or different from each other, and each independently N; or CRa, and at least one thereof is N; Ra, Ar2 and Ar4 are the same as or different from each other, and each independently selected from the group consisting of hydrogen; a substituted or unsubstituted C1 to C60 alkyl group; a substituted or unsubstituted C6 to C60 aryl group; a substituted or unsubstituted C2 to C60 heteroaryl group; -SiRR'R"; - P(=O)RR'; and an amine group unsubstituted or substituted with a substituted or unsubstituted C1 to C60 alkyl group, a substituted or unsubstituted C6 to C60 aryl group or a substituted or unsubstituted C2 to C60 heteroaryl group, or two or more groups adjacent to each other bond to each other to form a substituted or unsubstituted C6 to C60 aromatic hydrocarbon ring or a substituted or unsubstituted C2 to C60 heteroring; R3 to R11 are the same as or different from each other, and each independently selected from the group consisting of hydrogen; deuterium; a halogen group; and - CN; R, R' and R" are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted C1 to C40 alkyl group; or a substituted or unsubstituted C6 to C40 aryl group; and m is an integer of 1 to 6, and when m is 2 or greater, substituents in the parentheses are the same as or different from each other. wherein, in Chemical Formula 1, R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted C1 to C60 alkyl group; or a substituted or unsubstituted C6 to C60 aryl group; or groups adjacent to each other bond to each other to form a substituted or unsubstituted C6 to C60 aromatic hydrocarbon ring or a substituted or unsubstituted C2 to C60 heteroring; L1 is a direct bond; a substituted or unsubstituted C6 to C60 arylene group; or a substituted or unsubstituted C2 to C60 heteroarylene group; X1 to X3 are the same as or different from each other, and each independently N; or CRa, and at least one thereof is N; Ra, Ar2 and Ar4 are the same as or different from each other, and each independently selected from the group consisting of hydrogen; a substituted or unsubstituted C1 to C60 alkyl group; a substituted or unsubstituted C6 to C60 aryl group; a substituted or unsubstituted C2 to C60 heteroaryl group; -SiRR'R"; - P(=O)RR'; and an amine group unsubstituted or substituted with a substituted or unsubstituted C1 to C60 alkyl group, a substituted or unsubstituted C6 to C60 aryl group or a substituted or unsubstituted C2 to C60 heteroaryl group, or two or more groups adjacent to each other bond to each other to form a substituted or unsubstituted C6 to C60 aromatic hydrocarbon ring or a substituted or unsubstituted C2 to C60 heteroring; R3 to R11 are the same as or different from each other, and each independently selected from the group consisting of hydrogen; deuterium; a halogen group; and - CN; R, R' and R" are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted C1 to C40 alkyl group; or a substituted or unsubstituted C6 to C40 aryl group; and m is an integer of 1 to 6, and when m is 2 or greater, substituents in the parentheses are the same as or different from each other. <EOS>