An organic light emitting device comprising: an anode; a cathode; and a light emitting layer that is provided between the anode and the cathode, wherein the light emitting layer comprises a compound represented by the following Chemical Formula 1 and a compound represented by the following Chemical Formula 2: in the Chemical Formula 1, L is a single bond; or substituted or unsubstituted C 6-60 arylene; Ar 1 and Ar 2 are each independently substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one selected from the group consisting of N, O and S, Ar 3 is hydrogen; deuterium; substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one selected from the group consisting of N, O and S, D is deuterium, and n is an integer of 0 to 6, in the Chemical Formula 2, A' 1 is represented by the following Chemical Formula 2-a, in the Chemical Formula 2-a, the dotted line is fused with an adjacent ring, Ar' 1 is substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, and L' is a single bond; or substituted or unsubstituted C 6-60 arylene; Ar' 2 and Ar' 3 are each independently hydrogen; deuterium; substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, D is deuterium, and n' is an integer of 0 to 5. an anode; a cathode; and a light emitting layer that is provided between the anode and the cathode, wherein the light emitting layer comprises a compound represented by the following Chemical Formula 1 and a compound represented by the following Chemical Formula 2: in the Chemical Formula 1, L is a single bond; or substituted or unsubstituted C 6-60 arylene; Ar 1 and Ar 2 are each independently substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one selected from the group consisting of N, O and S, Ar 3 is hydrogen; deuterium; substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one selected from the group consisting of N, O and S, D is deuterium, and n is an integer of 0 to 6, in the Chemical Formula 2, A' 1 is represented by the following Chemical Formula 2-a, in the Chemical Formula 2-a, the dotted line is fused with an adjacent ring, Ar' 1 is substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, and L' is a single bond; or substituted or unsubstituted C 6-60 arylene; Ar' 2 and Ar' 3 are each independently hydrogen; deuterium; substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, D is deuterium, and n' is an integer of 0 to 5. L is a single bond; or substituted or unsubstituted C 6-60 arylene; Ar 1 and Ar 2 are each independently substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one selected from the group consisting of N, O and S, Ar 3 is hydrogen; deuterium; substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one selected from the group consisting of N, O and S, D is deuterium, and n is an integer of 0 to 6, in the Chemical Formula 2, A' 1 is represented by the following Chemical Formula 2-a, in the Chemical Formula 2-a, the dotted line is fused with an adjacent ring, Ar' 1 is substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, and L' is a single bond; or substituted or unsubstituted C 6-60 arylene; Ar' 2 and Ar' 3 are each independently hydrogen; deuterium; substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, D is deuterium, and n' is an integer of 0 to 5. the dotted line is fused with an adjacent ring, Ar' 1 is substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, and L' is a single bond; or substituted or unsubstituted C 6-60 arylene; Ar' 2 and Ar' 3 are each independently hydrogen; deuterium; substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, D is deuterium, and n' is an integer of 0 to 5.