An organic light emitting display device comprising: at least two or more light emitting parts each comprising a light emitting layer and an electron transport layer; and a charge generation layer between the at least two or more light emitting parts and including an N-type charge generation layer, wherein the electron transport layer includes an electron transport compound having a functional group with high electron mobility, and the N-type charge generation layer includes a charge generation compound including a functional group for matching the energy level of the electron transport compound, wherein the electron transport compound includes a triazine compound, and the charge generation compound includes a phenanthroline compound, wherein the electron transport compound is represented by the following Chemical Formula 1: wherein Ar includes a substituted or unsubstituted aryl group of 6 to 30 carbon atoms, R 1 and R 2 include independently one among a substituted or unsubstituted alkyl group of 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group of 1 to 6 carbon atoms, and a substituted or unsubstituted aryl group of 6 to 30 carbon atoms, or the electron transport compound is one among the following compounds: wherein the charge generation compound is represented by the following Chemical Formula 2: wherein X includes a substituted or unsubstituted naphthyl group, Y includes a substituted or unsubstituted aryl group with at least three or more ring structures, Z includes a phenyl group that is substituted or unsubstituted by an alkyl group, an aryl group, or a heteroaryl group, and o is 0 or 1. at least two or more light emitting parts each comprising a light emitting layer and an electron transport layer; and a charge generation layer between the at least two or more light emitting parts and including an N-type charge generation layer, wherein the electron transport layer includes an electron transport compound having a functional group with high electron mobility, and the N-type charge generation layer includes a charge generation compound including a functional group for matching the energy level of the electron transport compound, wherein the electron transport compound includes a triazine compound, and the charge generation compound includes a phenanthroline compound, wherein the electron transport compound is represented by the following Chemical Formula 1: wherein Ar includes a substituted or unsubstituted aryl group of 6 to 30 carbon atoms, R 1 and R 2 include independently one among a substituted or unsubstituted alkyl group of 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group of 1 to 6 carbon atoms, and a substituted or unsubstituted aryl group of 6 to 30 carbon atoms, or the electron transport compound is one among the following compounds: wherein the charge generation compound is represented by the following Chemical Formula 2: wherein X includes a substituted or unsubstituted naphthyl group, Y includes a substituted or unsubstituted aryl group with at least three or more ring structures, Z includes a phenyl group that is substituted or unsubstituted by an alkyl group, an aryl group, or a heteroaryl group, and o is 0 or 1.