A display device including a display area in which a plurality of data lines is arranged and a non-display area surrounding the display area, the display device comprising: a data driving circuit disposed in the non-display area and including a plurality of output terminals which outputs a data voltage to the data lines; a first fan-out line disposed in the non-display area and including a first end connected to an output terminal out of the plurality of output terminals corresponding to one data line out of the plurality of data lines in a first area of the display area and a second end connected to a first contact portion disposed in an area adjacent to an end of the data driving circuit; a second fan-out line disposed in the non-display area and including a first end connected to an output terminal out of the plurality of output terminals corresponding to another one data line out of the plurality of data lines in a second area of the display area and a second end connected to the another one data line in the second area; and a bypass fan-out line disposed in the non-display area and the display area and including a first end connected to the first contact portion and a second end connected to the one data line in the first area, wherein a portion of the first fan-out line and of the second fan-out line is disposed on a first insulating layer, and a remaining portion of the first fan-out line and of the second fan-out line is disposed on a second insulating layer disposed on the first insulating layer characterized in that the bypass fan-out line is disposed on a fourth insulating layer disposed on a third insulating layer, the third insulating layer being disposed on the second insulating layer, wherein the first and the second fan-out lines (F1, F2) and the bypass fan-out line are arranged to cross each other in a fan-out area adjacent to the data driving circuit, such that an arrangement order of the output terminals arranged in the data driving circuit is designed to be the same as an arrangement order of the data lines arranged in the display area. a data driving circuit disposed in the non-display area and including a plurality of output terminals which outputs a data voltage to the data lines; a first fan-out line disposed in the non-display area and including a first end connected to an output terminal out of the plurality of output terminals corresponding to one data line out of the plurality of data lines in a first area of the display area and a second end connected to a first contact portion disposed in an area adjacent to an end of the data driving circuit; a second fan-out line disposed in the non-display area and including a first end connected to an output terminal out of the plurality of output terminals corresponding to another one data line out of the plurality of data lines in a second area of the display area and a second end connected to the another one data line in the second area; and a bypass fan-out line disposed in the non-display area and the display area and including a first end connected to the first contact portion and a second end connected to the one data line in the first area, wherein a portion of the first fan-out line and of the second fan-out line is disposed on a first insulating layer, and a remaining portion of the first fan-out line and of the second fan-out line is disposed on a second insulating layer disposed on the first insulating layer characterized in that the bypass fan-out line is disposed on a fourth insulating layer disposed on a third insulating layer, the third insulating layer being disposed on the second insulating layer, wherein the first and the second fan-out lines (F1, F2) and the bypass fan-out line are arranged to cross each other in a fan-out area adjacent to the data driving circuit, such that an arrangement order of the output terminals arranged in the data driving circuit is designed to be the same as an arrangement order of the data lines arranged in the display area.