An organic light emitting diode comprising: a first electrode and a second electrode opposed to each other; a first light emitting unit and a second light emitting unit between the first electrode and the second electrode; and a charge generation layer between the first light emitting unit and the second light emitting unit, the first light emitting unit comprising: a first hole transport layer and a first electron transport layer opposed to each other; and a first organic light emitting layer between the first hole transport layer and the first electron transport layer, wherein the first organic light emitting layer is a blue fluorescent light emitting layer, and the second light emitting unit comprising: a second hole transport layer and a second electron transport layer opposed to each other; a second organic light emitting layer and a third organic light emitting layer between the second hole transport layer and the second electron transport layer, wherein the second organic light emitting layer is a blue light emitting layer comprising a fluorescent light emitting material, and the third organic light emitting layer is a yellow light emitting layer comprising a phosphorescent light emitting material; and characterized in that: the second light emitting unit further comprises an intermediate layer disposed between the second organic light emitting layer and the third organic light emitting layer. a first electrode and a second electrode opposed to each other; a first light emitting unit and a second light emitting unit between the first electrode and the second electrode; and a charge generation layer between the first light emitting unit and the second light emitting unit, the first light emitting unit comprising: a first hole transport layer and a first electron transport layer opposed to each other; and a first organic light emitting layer between the first hole transport layer and the first electron transport layer, wherein the first organic light emitting layer is a blue fluorescent light emitting layer, and a first hole transport layer and a first electron transport layer opposed to each other; and a first organic light emitting layer between the first hole transport layer and the first electron transport layer, wherein the first organic light emitting layer is a blue fluorescent light emitting layer, and the second light emitting unit comprising: a second hole transport layer and a second electron transport layer opposed to each other; a second organic light emitting layer and a third organic light emitting layer between the second hole transport layer and the second electron transport layer, wherein the second organic light emitting layer is a blue light emitting layer comprising a fluorescent light emitting material, and the third organic light emitting layer is a yellow light emitting layer comprising a phosphorescent light emitting material; and a second hole transport layer and a second electron transport layer opposed to each other; a second organic light emitting layer and a third organic light emitting layer between the second hole transport layer and the second electron transport layer, wherein the second organic light emitting layer is a blue light emitting layer comprising a fluorescent light emitting material, and the third organic light emitting layer is a yellow light emitting layer comprising a phosphorescent light emitting material; and characterized in that: the second light emitting unit further comprises an intermediate layer disposed between the second organic light emitting layer and the third organic light emitting layer.