An organic electroluminescent compound represented by the following formula 11: wherein Ar 11 to Ar 20, each independently, represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (5- to 30-membered)heteroaryl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, or a substituted or unsubstituted (C3-C30)cycloalkyl; with the proviso that at least one of Ar 11 to Ar 20 is represented by the following formula 11-1: Wherein HAr 11 represents A ring represents a naphthalene ring; L 11 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (5- to 30-membered)heteroarylene; R 10 and R 11, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 25-membered)heteroaryl, -NR 5 R 6, or -SiR 7 R 8 R 9; or R 10 and R 11 may be linked to each other to form a ring; characterized in that R 31 represents hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, -NR 5 R 6, or - SiR 7 R 8 R 9;and R 5 to R 9, each independently, represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; c' represents an integer of 1 to 5, e' represents an integer of 1 to 7, where if c' and e', each independently, are an integer of 2 or more, each R 31 may be the same or different. Ar 11 to Ar 20, each independently, represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (5- to 30-membered)heteroaryl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, or a substituted or unsubstituted (C3-C30)cycloalkyl; with the proviso that at least one of Ar 11 to Ar 20 is represented by the following formula 11-1: Wherein HAr 11 represents A ring represents a naphthalene ring; L 11 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (5- to 30-membered)heteroarylene; R 10 and R 11, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 25-membered)heteroaryl, -NR 5 R 6, or -SiR 7 R 8 R 9; or R 10 and R 11 may be linked to each other to form a ring; characterized in that R 31 represents hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, -NR 5 R 6, or - SiR 7 R 8 R 9;and R 5 to R 9, each independently, represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; c' represents an integer of 1 to 5, e' represents an integer of 1 to 7, where if c' and e', each independently, are an integer of 2 or more, each R 31 may be the same or different.