A display device includes a display area of various shapes, has a reduced dead space, and displays an image. Further, the display device includes a display unit including a rounded corner portion, a first driving voltage supply line arranged in a first direction in a non-display area on one side of the display unit, a plurality of first driving voltage lines which supplies a driving voltage to a plurality of pixels and is arranged in a second direction that intersects with the first direction and being connected to the first driving voltage supply line, and a plurality of second driving voltage lines disconnected from the first driving voltage supply line.