Provided is a display device having a first region and a second region. The first region includes: a base film; a first layer located over the base film and including a transistor; and a second layer located over the first layer and including a light-emitting element electrically connected to the transistor. The second region includes: the base film; a substrate under the base substrate; and a wiring layer located over the base film and including a wiring extending from the first layer to an edge portion of the base film. A thickness of the substrate decreases with decreasing distance to the first region.