A method of manufacturing a display device includes: providing a substrate including a first area, a second area at an end portion of the substrate, and a bendable area between the first and second areas; forming a display element on a first surface of the substrate in the first area; attaching a protective film on a second surface of the substrate which is opposite to the first surface thereof, in the first, second and bendable areas; attaching an electronic element on the first surface in the second area; forming a bending protective layer on the first surface in the bendable area, the bending protective layer extending from the bendable area to cover the electronic element in the second area of the substrate; and in the bendable area of the substrate, removing a portion of the protective film on the second surface of the substrate.