A display device includes a first data line extending in a first direction, arranged in a display area, and connected to a first display element; a second data line extending in the first direction, arranged in the display area, and connected to a second display element; an auxiliary line arranged in a first non-display area and connecting the first data line to the second data line; and a plurality of patterns arranged apart from the auxiliary line in surroundings of the auxiliary line in the first non-display area.