To provide an organic EL display device with high contrast and definition, prevented from color mixture between adjacent pixels.

Fine indentation 35 is formed on a whole surface of a transparent base plate 30. Out of light emitted from light-emitting layers 16 of respective pixels and directly incident on the transparent base plate 30 or incident after being reflected by the opposite electrode 33, the light reflected by the inner surface of the transparent base plate 30 and traveling through the transparent base plate 30 is reflected diffusely by the indentation 35, so that the light from the light-emitting layers 16 is prevented from leaking into adjacent pixels, and deterioration of contrast can be prevented.