A display device comprising: a base layer comprising: a first region (AR1a, AR1b) in which a hole is defined; a second region configured to surround the first region (AR1a, AR1b); and a third region configured to surround the second region; a line part disposed on the second region, the line part comprising a first line (SLa), a second line (SLb), a third line (SLc), and a fourth line (SLd) disposed on different layers from each other and are substantially parallel to each other; pixels disposed on the third region; first signal lines electrically connected to the pixels, the first signal lines arrayed along a first direction; second signal lines electrically connected to the pixels, the second signal lines arrayed along a second direction that intersects with the first direction, a first insulation layer disposed between the first line (SLa) and the second line (SLb); a second insulation layer disposed between the second line (SLb) and the third line (SLc); and a third insulation layer disposed between the third line (SLc) and the fourth line (SLd), characterized in that one second signal line of the second signal lines is electrically connected to the first line (SLa), another second signal line of the second signal lines is electrically connected to the second line (SLb), one first signal line of the first signal lines is electrically connected to the third line (SLc), and another first signal line of the first signal lines is electrically connected to the fourth line (SLd), wherein the first line (SLa), the first insulation layer, the second line (SLb), the second insulation layer, the third line (SLc), the third insulation layer, and the fourth line (SLd) are sequentially disposed on the base layer, wherein, in a planar view, the first line (SLa) and the second line (SLb) do not overlap, and the third line (SLc) and the fourth line (SLd) do not overlap, and wherein each of the third line (SLc) and the fourth line (SLd) overlaps at least a portion of the first line (SLa) or at least a portion of the second line (SLb). a base layer comprising: a first region (AR1a, AR1b) in which a hole is defined; a second region configured to surround the first region (AR1a, AR1b); and a third region configured to surround the second region; a line part disposed on the second region, the line part comprising a first line (SLa), a second line (SLb), a third line (SLc), and a fourth line (SLd) disposed on different layers from each other and are substantially parallel to each other; pixels disposed on the third region; first signal lines electrically connected to the pixels, the first signal lines arrayed along a first direction; second signal lines electrically connected to the pixels, the second signal lines arrayed along a second direction that intersects with the first direction, a first insulation layer disposed between the first line (SLa) and the second line (SLb); a second insulation layer disposed between the second line (SLb) and the third line (SLc); and a third insulation layer disposed between the third line (SLc) and the fourth line (SLd), characterized in that one second signal line of the second signal lines is electrically connected to the first line (SLa), another second signal line of the second signal lines is electrically connected to the second line (SLb), one first signal line of the first signal lines is electrically connected to the third line (SLc), and another first signal line of the first signal lines is electrically connected to the fourth line (SLd), wherein the first line (SLa), the first insulation layer, the second line (SLb), the second insulation layer, the third line (SLc), the third insulation layer, and the fourth line (SLd) are sequentially disposed on the base layer, wherein, in a planar view, the first line (SLa) and the second line (SLb) do not overlap, and the third line (SLc) and the fourth line (SLd) do not overlap, and wherein each of the third line (SLc) and the fourth line (SLd) overlaps at least a portion of the first line (SLa) or at least a portion of the second line (SLb).