The present disclosure relates to an organic light emitting diode display having high aperture ratio. The present disclosure suggests an organic light emitting diode display comprising: a substrate having a plurality of pixel area arrayed in a matrix manner; an anode electrode formed within the pixel area on the substrate; a first bank having an open area exposing most of the anode electrode and defining an emission area; a second bank exposing the open area exposed by the first bank and some upper surface of the first bank; an organic light emitting layer covering the some upper surface of the first bank by the second bank and the most of anode electrode exposed by the first bank; and a cathode electrode formed over the substrate having the organic light emitting layer.