An organic light emitting display device includes: a thin film transistor disposed in a display area of a substrate; an insulating layer disposed on the thin film transistor; an organic light emitting element disposed on the insulating layer and connected to the thin film transistor; and an encapsulation layer covering the organic light emitting element. The encapsulation layer includes: a first inorganic layer extending from the organic light emitting element to a non-display area; an organic layer disposed on the first inorganic layer; a second inorganic layer extending from the organic layer to the non-display area; and an organic pattern layer disposed between the first inorganic layer and the second inorganic layer and spaced apart from the organic layer in the non-display area. At least a part of the first inorganic layer and at least a part of the second inorganic layer may contact each other in the non-display area.