Disclosed is a display device having a substrate, a pixel located over the substrate and including a display element, a touch sensor over the pixel through a first adhesive film, a polarizing plate over the touch sensor, and a sealing material covering a side surface of the polarizing plate and at least one of a part of a top surface and a part of an undersurface of the polarizing plate. The sealing material may further cover a side surface of the touch sensor. The sealing material may have a moisture permeability of equal to or larger than 30 g/m2·24 h and equal to or smaller than 80 g/m2·24 h at a temperature of 40° C. and at a humidity of 90%.