Provided is an organic light-emitting display apparatus with improved contrast. The organic light-emitting display apparatus includes: a substrate; an organic light-emitting device on the substrate, the organic light-emitting device including a first electrode, a second electrode, and an organic light-emitting layer between the first electrode and the second electrode; and a pixel define layer on the first electrode, the pixel define layer including an opening through which the first electrode is exposed and having a black color, wherein the organic light-emitting layer and the second electrode are sequentially disposed on a portion of the first electrode exposed through the opening, and the second electrode includes indium oxide doped with a metal or metal oxide.