A method of manufacturing a display panel, including providing a plurality of display substrates spaced apart from each other by a predetermined area disposed therebetween when viewed in a plan view, each of the display substrates including a display area, on which an image is displayed, and each of the display substrates being flexible; attaching a first film onto the display substrates to overlap with the display substrates; attaching a second film onto the first film; and substantially and simultaneously cutting the first and second films along a cutting line defined in an area overlapping with the predetermined area.