A compound for an organic optoelectronic device represented by the following Chemical Formula 3: wherein, in the above Chemical Formula 3, X 1 and X 2 are N, L 1 to L 4 are independently a single bond, a substituted or unsubstituted C6 to C30 arylene group or a substituted or unsubstituted C2 to C30 heteroarylene group, n1 to n4 are independently integers of 0 to 3, ETU 1 and ETU 2 having electron transport characteristics are independently a substituted or unsubstituted imidazolyl group, a substituted or unsubstituted triazolyl group, a substituted or unsubstituted tetrazolyl group, a substituted or unsubstituted oxadiazolyl group, a substituted or unsubstituted oxatriazolyl group, a substituted or unsubstituted thiatriazolyl group, a substituted or unsubstituted benzimidazolyl group, a substituted or unsubstituted benzotriazolyl group, a substituted or unsubstituted pyridinyl group, a substituted or unsubstituted pyrimidinyl group, a substituted or unsubstituted triazinyl group, a substituted or unsubstituted pyrazinyl group, a substituted or unsubstituted pyridazinyl group, a substituted or unsubstituted purinyl group, a substituted or unsubstituted quinolinyl group, a substituted or unsubstituted isoquinolinyl group, a substituted or unsubstituted phthalazinyl group, a substituted or unsubstituted naphpyridinyl group, a substituted or unsubstituted quinoxalinyl group, a substituted or unsubstituted quinazolinyl group, a substituted or unsubstituted acridinyl group, a substituted or unsubstituted phenanthrolinyl group, a substituted or unsubstituted phenazinyl group, or a combination thereof, HTU 1 and HTU 2 having hole transport characteristics are independently a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted anthracenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted spiro-fluorenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted pyrenyl group, a substituted or unsubstituted perylenyl group, or a combination thereof, and m1 and m2 are respectively 1 or X 1 is N and X 2 is -CH-, L 1 to L 4 are independently a single bond, a substituted or unsubstituted C6 to C30 arylene group or a substituted or unsubstituted C2 to C30 heteroarylene group, n1 to n4 are independently integers of 0 to 3, ETU 1 and ETU 2 are independently a substituted or unsubstituted C2 to C30 heteroaryl group having electron transport characteristics, HTU 1 and HTU 2 are independently a substituted or unsubstituted C6 to C30 aryl group having hole transport characteristics, and m1 and m2 are 0 or 1. X 1 and X 2 are N, L 1 to L 4 are independently a single bond, a substituted or unsubstituted C6 to C30 arylene group or a substituted or unsubstituted C2 to C30 heteroarylene group, n1 to n4 are independently integers of 0 to 3, ETU 1 and ETU 2 having electron transport characteristics are independently a substituted or unsubstituted imidazolyl group, a substituted or unsubstituted triazolyl group, a substituted or unsubstituted tetrazolyl group, a substituted or unsubstituted oxadiazolyl group, a substituted or unsubstituted oxatriazolyl group, a substituted or unsubstituted thiatriazolyl group, a substituted or unsubstituted benzimidazolyl group, a substituted or unsubstituted benzotriazolyl group, a substituted or unsubstituted pyridinyl group, a substituted or unsubstituted pyrimidinyl group, a substituted or unsubstituted triazinyl group, a substituted or unsubstituted pyrazinyl group, a substituted or unsubstituted pyridazinyl group, a substituted or unsubstituted purinyl group, a substituted or unsubstituted quinolinyl group, a substituted or unsubstituted isoquinolinyl group, a substituted or unsubstituted phthalazinyl group, a substituted or unsubstituted naphpyridinyl group, a substituted or unsubstituted quinoxalinyl group, a substituted or unsubstituted quinazolinyl group, a substituted or unsubstituted acridinyl group, a substituted or unsubstituted phenanthrolinyl group, a substituted or unsubstituted phenazinyl group, or a combination thereof, HTU 1 and HTU 2 having hole transport characteristics are independently a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted anthracenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted spiro-fluorenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted pyrenyl group, a substituted or unsubstituted perylenyl group, or a combination thereof, and m1 and m2 are respectively 1 or X 1 is N and X 2 is -CH-, L 1 to L 4 are independently a single bond, a substituted or unsubstituted C6 to C30 arylene group or a substituted or unsubstituted C2 to C30 heteroarylene group, n1 to n4 are independently integers of 0 to 3, ETU 1 and ETU 2 are independently a substituted or unsubstituted C2 to C30 heteroaryl group having electron transport characteristics, HTU 1 and HTU 2 are independently a substituted or unsubstituted C6 to C30 aryl group having hole transport characteristics, and m1 and m2 are 0 or 1.