An organic light emitting display apparatus including: a substrate; a thin film transistor formed on the substrate; a planarization layer formed on the substrate to cover the thin film transistor and comprising a closed-loop groove; a pixel electrode that contacts the thin film transistor and is formed on the planarization layer; a pixel defining layer formed to fill the closed-loop groove; a spacer formed on the planarization layer and disposed outside the pixel electrode; an organic light emitting layer formed on the pixel electrode; and an opposite electrode covering the organic light emitting layer.