An organic light emitting diode (OLED) display includes a display substrate including a display substrate including an organic light emitting element and a pixel defining layer having an opening defining a light emitting region of the organic light emitting element, an encapsulation substrate arranged opposite to the display substrate, a sealant arranged at an edge between the display substrate and the encapsulation substrate to seal a space between the display substrate and the encapsulation substrate from an outside and a filler filling the space between the display substrate and the encapsulation substrate, wherein the pixel defining layer has a thickness that varies by location, and a portion of the pixel defining layer closest to the sealant at edges of the display substrate having a thickness that is greater than a thickness of the pixel defining layer at all other portions of the display.