An organic light emitting diode (OLED) display includes a display substrate including an organic light emitting element, an encapsulation substrate arranged opposite to the display substrate and covering the organic light emitting element, a sealant disposed on the edge of the display substrate and the encapsulation substrate, and sealing the display substrate and the encapsulation substrate to each other; and a filler filling the space between the display substrate and the encapsulation substrate. One surface of at least one of the display substrate and the encapsulation substrate is contacted with the filler and is divided into a hydrophobic region and a hydrophilic region, and the hydrophobic region is positioned between the hydrophilic region and the sealant.