An organic light-emitting display apparatus includes a substrate, thin film transistors (TFTs), and organic light-emitting diode elements (OLEDs). First wirings have a first width and a first height and second wirings have a second width and a second height, in which the first wirings and the second wirings are formed in at least a portion of areas between the OLEDs. Third wirings connect the first wirings and the second wirings and have a third width smaller than the first width of the first wirings and the second width of the second wirings or have a third height smaller than the first height of the first wirings and the second height of the second wirings. An insulating layer covers at least a portion of the first and second wiring portions and exposes at least a portion of the third wirings.