An organic light-emitting display apparatus includes a buffer layer formed on a substrate; a gate insulating layer formed over the buffer layer; an interlayer insulating layer formed over the gate insulating layer; a first opening formed through the gate insulating layer and the interlayer insulating layer; a first organic insulating layer formed over the interlayer insulating layer and including a second opening that overlaps with the first opening; a pixel electrode formed in the second opening, and directly contacting the buffer layer; a light emission layer formed over the pixel electrode; and an opposite electrode formed over the light emission layer.