A display device may include an organic light emitting device and an encapsulation member provided on the organic light emitting device to seal the organic light emitting device. The encapsulation member may include a lower encapsulation layer, which is provided on the organic light emitting device and includes oxynitride and nitride, an organic layer provided on the lower encapsulation layer, and an upper encapsulation layer provided on the organic layer. A content of oxynitride in the lower encapsulation layer may increase with decreasing distance from the organic layer.