An object of the present invention is to provide an organic light-emitting display device using a number of organic light-emitting elements that emit lights of different colors, wherein the life of the organic light-emitting elements that emits light of a color having a short life can be prolonged. According to the present invention, a hole injection layer (7), an alpha-NPD vapor deposited film (8), an n doped electron transportation layer (11) and a p doped hole transportation layer (12), which are patterned to the same size as B sub-pixels, a DNA vapor deposited film (13), an electron injection layer (14) and an upper electrode (15) are formed on a lower electrode (5) in a B sub-pixel. The alpha-NPD vapor deposited film (8) and the DNA vapor deposited film (13) function as a blue light-emitting layer and exhibit the same properties as when a blue light-emitting element made up of a lower electrode (5), a hole injection layer (7), an alpha-NPD vapor deposited film (8) and an n doped electron transportation layer (11) and a blue light-emitting element made up of a p doped hole transportation layer (12), a DNA vapor deposited film (13), an electron injection layer (14) and an upper electrode (15) are connected in series. Therefore, it becomes possible to lower the value of a current required for certain brightness, and thus, the life can be prolonged.