A display device includes a substrate; a via insulating layer on the substrate; and a first inner bank and a second inner bank on the via insulating layer and spaced from each other, wherein the via insulating layer includes a protruding portion located in a gap between the first inner bank and the second inner bank, and protruding from a top surface of the via insulating layer, and a thickness of the protruding portion is less than a thickness of the first inner bank and a thickness of the second inner bank.