An exemplary embodiment discloses an organic light emitting display panel including a base substrate comprising first pixels configured to emit a light having a first wavelength and second pixels configured to emit a light having a second wavelength and a pixel definition layer disposed on the base substrate. The pixel definition layer includes first and second openings. The first opening corresponds to light emitting areas of n (n is a natural number equal to or greater than 2) first pixels among the first pixels. The second opening corresponds to light emitting areas of m (m is a natural number equal to or greater than 1 and smaller than n) second pixels among the second pixels. An area of the light emitting area of each of the first pixels is smaller than an area of the light emitting area of each of the second pixels.