A display device includes a substrate, a mask, a case, and a sealing member. The mask has a mask surface and a side wall provided around a periphery of the mask surface and projecting backwardly from the mask surface. The mask is provided on a front surface of the substrate so that the mask surface faces the front surface of the substrate and the side wall surrounds a side surface of the substrate. The case is provided on a back surface of the substrate to sandwich the substrate between the mask and the case. The sealing member is provided in a first region, a second region, and a third region provided between the first region and the second region. The sealing member has a first protrusion which is in contact with a step end surface of the case in the third region.