A display device includes a plurality of gate lines extending in a first direction on the display area, a plurality of source lines extending in a second direction, a plurality of lead-out lines extending in the second direction and for transmitting gate signals to the plurality of gate lines. A plurality of connecting portions each electrically connects one gate line to one lead-out line. The plurality of connecting portions pass through a first insulating layer at a plurality of jointing points which are selected among a plurality of overlapping points where the plurality of lead-out lines and the plurality of gate lines overlap in a plane area.