A method of manufacturing an organic light emitting diode (OLED) display includes forming an upper electrode power source line outside of a pixel area over a substrate, forming a lower electrode in the pixel area, forming at least one layer of an organic material layer in the pixel area and areas outside of the pixel area, forming an upper electrode in the pixel area, selectively removing portions of the organic material layer that are exposed outside of the upper electrode, thereby exposing the upper electrode power source line, and coating a conductive material between the upper electrode and the upper electrode power source line in a normal pressure condition such that the conductive material overlaps the upper electrode and the upper electrode power source line, thereby forming a connection portion.