Provided is a compound of Chemical Formula 1:






wherein:

X is O or S;
L is a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group;
Ar1 is a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group;
Ar2 is a substituted or unsubstituted aryl group having 6 to 30 carbon atoms;
R1 to R8 are the same as or different from each other, and each independently is hydrogen, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group; and
m and n are each an integer of 0 to 7, and when m is 2 or greater, R7s are the same as or different from each other, and when n is 2 or greater, R8s are the same as or different from each other,

and an organic light emitting device including the same.