An organic light-emitting display apparatus includes: pixel electrodes spaced apart from one another; a pixel defining layer overlapping edges of each of the pixel electrodes; an opposite electrode commonly overlapping the pixel electrodes and the pixel defining layer; an emission layer provided in plural between the pixel electrodes and the opposite electrode, the plural emission layers respectively overlapping the pixel electrodes; a reflection adjustment layer overlapping the pixel electrodes and the pixel defining layer, the reflection adjustment layer having conductivity and contacting the opposite electrode; and a phase control layer provided in plural spaced apart from each other between the opposite electrode and the reflection adjustment layer.