A display device includes a substrate having display portion and peripheral portion, a plurality of gate signal lines and a plurality of drain signal lines formed over the substrate, a plurality of switching elements connected to the plurality of gate signal lines and the plurality of drain signal lines and formed over the substrate, and a plurality of pixel electrodes connected to the plurality of switching elements and formed in the display portion. An organic interlayer film is formed in the display portion and the peripheral portion, an insulating film is formed between the substrate and the organic interlayer film in the display portion and the peripheral portion, and the insulating film includes at least one of a plurality of recesses and protuberances.