A display device includes a substrate including a display area and a peripheral area; pixel electrodes in the display area and spaced apart from each other; a pixel-defining layer exposing upper surfaces of the pixel electrodes, covering edges of the pixel electrodes, and including an inorganic insulating material; an auxiliary electrode on the pixel-defining layer; a first intermediate layer on a first pixel electrode among the pixel electrodes; a first opposite electrode on the first intermediate layer; a second intermediate layer on a second pixel electrode from among the pixel electrodes, the second pixel electrode neighboring the first pixel electrode; a second opposite electrode on the second intermediate layer and electrically connected to the first opposite electrode via the auxiliary electrode; a power voltage supply line in the peripheral area; and a connection electrode layer electrically connecting the auxiliary electrode to the power voltage supply line.