It is an object of the present invention to provide an organic
light-emitting display of high light-emitting efficiency. The organic
light-emitting element comprising a board, upper electrode, lower
electrode, a plurality of light-emitting units placed between the upper
and lower electrodes, and a charge-generating layer placed between a
plurality of the light-emitting units, wherein one of the light-emitting
units has a layer for emitting monochromatic light and one of the
light-emitting units has a layer for emitting polychromatic light, the
former unit having an equivalent or lower light-emitting efficiency than
the latter unit.