An organic light-emitting diode display is disclosed. In one aspect, the display includes a substrate and a plurality of pixels formed over the substrate, each pixel including a first region from which light is emitted and a second region through which external light is transmitted. The display also includes a plurality of pixel circuit units each formed in the first region and including at least one thin-film transistor, an inorganic insulating film formed in the second region, a transparent conductive film formed over at least a portion of the inorganic insulating film, and an organic insulating film covering the pixel circuit units and at least a portion of the transparent conductive film. The display further includes a plurality of first electrodes formed over the organic insulating film and in the first regions of the pixels.