A compound for an emission layer of an organic optoelectronic device represented by Chemical Formula 1: wherein, in Chemical Formula 1, X 1 to X 3 are independently -C(R')- or -N-, provided that at least one of X 1 to X 3 is -N-, X 4 is a single bond, -C(R')(R")-, -O-, -S-, -S(=O)-, -S(=O) 2 -, -Si(R')(R")- or - C(=O)-, R 1 to R 4, R', and R" are independently hydrogen, deuterium, a halogen, a cyano group, a hydroxyl group, an amino group, a substituted or unsubstituted C1 to C20 amine group, a nitro group, a carboxyl group, a ferrocenyl group, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C6 to C20 aryloxy group, a substituted or unsubstituted C3 to C40 silyloxy group, a substituted or unsubstituted C1 to C20 acyl group, a substituted or unsubstituted C2 to C20 alkoxycarbonyl group, a substituted or unsubstituted C2 to C20 acyloxy group, a substituted or unsubstituted C2 to C20 acylamino group, a substituted or unsubstituted C2 to C20 alkoxycarbonylamino group, a substituted or unsubstituted C7 to C20 aryloxycarbonylamino group, a substituted or unsubstituted C1 to C20 sulfamoylamino group, a substituted or unsubstituted C1 to C20 sulfonyl group, a substituted or unsubstituted C1 to C20 alkylthiol group, a substituted or unsubstituted C6 to C20 arylthiol group, a substituted or unsubstituted C1 to C20 heterocyclothiol group, a substituted or unsubstituted C1 to C20 ureide group, a substituted or unsubstituted C3 to C40 silyl group, or a combination thereof, L is a substituted or unsubstituted C2 to C20 alkenylene group, a substituted or unsubstituted C2 to C20 alkynylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted quinolinylene group, a substituted or unsubstituted isoquinolinylene group, a substituted or unsubstituted pyridinylene group, a substituted or unsubstituted pyrimidinylene group, a substituted or unsubstituted triazinylene group, a substituted or unsubstituted pyrrolylene group, a substituted or unsubstituted pyrazolylene group, a substituted or unsubstituted imidazolylene group, a substituted or unsubstituted imidazoliylene group, a substituted or unsubstituted pyrazinylene group, a substituted or unsubstituted indolylene group, a substituted or unsubstituted furylylene group, a substituted or unsubstituted indazolylene group, a substituted or unsubstituted thiophenylene group, a substituted or unsubstituted benzothiophenylene group, an isothiazolylene groupor combination thereof, and Ar 1 and Ar 2 are independently a substituted or unsubstituted C6 to C30 aryl group or a substituted or unsubstituted C2 to C30 heteroaryl group. X 1 to X 3 are independently -C(R')- or -N-, provided that at least one of X 1 to X 3 is -N-, X 4 is a single bond, -C(R')(R")-, -O-, -S-, -S(=O)-, -S(=O) 2 -, -Si(R')(R")- or - C(=O)-, R 1 to R 4, R', and R" are independently hydrogen, deuterium, a halogen, a cyano group, a hydroxyl group, an amino group, a substituted or unsubstituted C1 to C20 amine group, a nitro group, a carboxyl group, a ferrocenyl group, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C6 to C20 aryloxy group, a substituted or unsubstituted C3 to C40 silyloxy group, a substituted or unsubstituted C1 to C20 acyl group, a substituted or unsubstituted C2 to C20 alkoxycarbonyl group, a substituted or unsubstituted C2 to C20 acyloxy group, a substituted or unsubstituted C2 to C20 acylamino group, a substituted or unsubstituted C2 to C20 alkoxycarbonylamino group, a substituted or unsubstituted C7 to C20 aryloxycarbonylamino group, a substituted or unsubstituted C1 to C20 sulfamoylamino group, a substituted or unsubstituted C1 to C20 sulfonyl group, a substituted or unsubstituted C1 to C20 alkylthiol group, a substituted or unsubstituted C6 to C20 arylthiol group, a substituted or unsubstituted C1 to C20 heterocyclothiol group, a substituted or unsubstituted C1 to C20 ureide group, a substituted or unsubstituted C3 to C40 silyl group, or a combination thereof, L is a substituted or unsubstituted C2 to C20 alkenylene group, a substituted or unsubstituted C2 to C20 alkynylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted quinolinylene group, a substituted or unsubstituted isoquinolinylene group, a substituted or unsubstituted pyridinylene group, a substituted or unsubstituted pyrimidinylene group, a substituted or unsubstituted triazinylene group, a substituted or unsubstituted pyrrolylene group, a substituted or unsubstituted pyrazolylene group, a substituted or unsubstituted imidazolylene group, a substituted or unsubstituted imidazoliylene group, a substituted or unsubstituted pyrazinylene group, a substituted or unsubstituted indolylene group, a substituted or unsubstituted furylylene group, a substituted or unsubstituted indazolylene group, a substituted or unsubstituted thiophenylene group, a substituted or unsubstituted benzothiophenylene group, an isothiazolylene groupor combination thereof, and Ar 1 and Ar 2 are independently a substituted or unsubstituted C6 to C30 aryl group or a substituted or unsubstituted C2 to C30 heteroaryl group.