An organic light emitting device comprising: a first electrode; a hole transport layer; a light emitting layer; an electron transport layer; and a second electrode, wherein the light emitting layer comprises a compound represented by Chemical Formula 1 below and the electron transport layer comprises a compound represented by Chemical Formula 2 below: in Chemical Formula 1, Ar 1 and Ar 2 are the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 aryl, I and p are each independently an integer of 0 to 4, m and o are each independently an integer of 0 to 2, R 1 to R 4 are the same as or different from each other, and each independently represent hydrogen or carbazolyl substituted with phenyl, in Chemical Formula 2, X 1 to X 3 are the same as or different from each other, and each independently represent N, or CH, provided that at least one of X 1 to X 3 is N, Ar 4 and Ar 5 are the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 aryl; or C 2-60 heteroaryl containing one or more heteroatoms each independently selected from the group consisting of N, O and S; each L is independently the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 arylene; or C 2-60 heteroarylene containing one or more heteroatoms each independently selected from the group consisting of N, O, S and P, and Ar6 is a substituted or unsubstituted C 6-60 arylene; or C 2-60 heteroarylene containing one or more heteroatoms each independently selected from the group consisting of N, O and S. a first electrode; a hole transport layer; a light emitting layer; an electron transport layer; and a second electrode, wherein the light emitting layer comprises a compound represented by Chemical Formula 1 below and the electron transport layer comprises a compound represented by Chemical Formula 2 below: in Chemical Formula 1, Ar 1 and Ar 2 are the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 aryl, I and p are each independently an integer of 0 to 4, m and o are each independently an integer of 0 to 2, R 1 to R 4 are the same as or different from each other, and each independently represent hydrogen or carbazolyl substituted with phenyl, in Chemical Formula 2, X 1 to X 3 are the same as or different from each other, and each independently represent N, or CH, provided that at least one of X 1 to X 3 is N, Ar 4 and Ar 5 are the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 aryl; or C 2-60 heteroaryl containing one or more heteroatoms each independently selected from the group consisting of N, O and S; each L is independently the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 arylene; or C 2-60 heteroarylene containing one or more heteroatoms each independently selected from the group consisting of N, O, S and P, and Ar6 is a substituted or unsubstituted C 6-60 arylene; or C 2-60 heteroarylene containing one or more heteroatoms each independently selected from the group consisting of N, O and S. Ar 1 and Ar 2 are the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 aryl, I and p are each independently an integer of 0 to 4, m and o are each independently an integer of 0 to 2, R 1 to R 4 are the same as or different from each other, and each independently represent hydrogen or carbazolyl substituted with phenyl, in Chemical Formula 2, X 1 to X 3 are the same as or different from each other, and each independently represent N, or CH, provided that at least one of X 1 to X 3 is N, Ar 4 and Ar 5 are the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 aryl; or C 2-60 heteroaryl containing one or more heteroatoms each independently selected from the group consisting of N, O and S; each L is independently the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 arylene; or C 2-60 heteroarylene containing one or more heteroatoms each independently selected from the group consisting of N, O, S and P, and Ar6 is a substituted or unsubstituted C 6-60 arylene; or C 2-60 heteroarylene containing one or more heteroatoms each independently selected from the group consisting of N, O and S. X 1 to X 3 are the same as or different from each other, and each independently represent N, or CH, provided that at least one of X 1 to X 3 is N, Ar 4 and Ar 5 are the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 aryl; or C 2-60 heteroaryl containing one or more heteroatoms each independently selected from the group consisting of N, O and S; each L is independently the same as or different from each other, and each independently represent a substituted or unsubstituted C 6-60 arylene; or C 2-60 heteroarylene containing one or more heteroatoms each independently selected from the group consisting of N, O, S and P, and Ar6 is a substituted or unsubstituted C 6-60 arylene; or C 2-60 heteroarylene containing one or more heteroatoms each independently selected from the group consisting of N, O and S.