Discussed is a method of manufacturing a display device. The method of manufacturing the display device according to one example includes providing a first substrate including a display part, a bending part at one side of the display part, and a pad part at an end of the bending part. The method further includes providing a second substrate facing-coupled to the display part, providing a back film, and adhering the back film to a portion corresponding to the display part and the pad part on a bottom of the first substrate.