According to one embodiment, a display device includes a display area, a first peripheral area, an organic insulating film. The display area is provided on a substrate and includes a plurality of organic electroluminescent (EL) elements aligned. The first peripheral area is provided on the substrate, around the display area. The organic insulating film is provided on the substrate and covers a circuit including a drive circuit driving the organic EL elements. The organic insulating film comprises a first groove provided in the organic insulating film, around the display area, in an area between the display area and the first peripheral area, and a dummy area to which at least one of functional materials of the organic EL elements is applied, on the first peripheral area.