An OLED lighting apparatus of a tiling structure in a seamless structure without a bezel area is discussed. The OLED lighting apparatus includes a first flexible OLED panel and a second flexible OLED panel. The first flexible OLED panel which a bezel area and one side of a light emitting area are bent, and the second flexible OLED panel which a bezel area is bent, are fastened by a fastening member, and a light guide plate and an optical member are arranged on the fastening member. As a result, the OLED lighting apparatus tiles by using the fastening member at a boundary portion to which the first and second flexible OLED panels contact, and the light guide plate and the optical member are applied on the fastening member, so that a light can be emitted even at the boundary portion to which first and second flexible OLED panels contact.