An organic light emitting diode display includes: a substrate including a display area displaying an image and a peripheral area enclosing the display area; a plurality of signal lines formed in the display area; a plurality of pixels connected to the plurality of signal lines; a plurality of fan-out lines formed in the peripheral area and connected to the plurality of pixels; a first interlayer insulating layer covering the plurality of fan-out lines; a second interlayer insulating layer covering the first interlayer insulating layer and including a first sealant opening exposing a portion of the first interlayer insulating layer; and an etching preventing member positioned in the first sealant opening and overlapping the plurality of fan-out lines in plan view.