A display device, comprising: a substrate comprising a display area and a peripheral area disposed outside of the display area, wherein the display area comprises a plurality of pixels; an inorganic insulating layer disposed in the display area, wherein the inorganic insulating layer comprises a groove disposed in a region between pixels of the plurality of pixels; an organic material layer filling the groove; a first connection wiring disposed on the organic material layer, wherein the first connection wiring overlaps the plurality of pixels and extends in a second direction; and a second connection wiring insulated from the first connection wiring, wherein the second connection wiring extends in a first direction that crosses the second direction; wherein the plurality of pixels comprises a first pixel and a second pixel disposed adjacent to each other in the second direction, wherein the first pixel comprises a first conductive layer part extending in the second direction and the second pixel comprises a second conductive layer part extending in the second direction, wherein the first conductive layer part and the second conductive layer part are below the first connection wiring and are separated from the first connection wiring by the inorganic insulating layer ; and wherein the first conductive layer part is spaced apart from the second conductive layer part by the groove with the organic material layer in the second direction and the first conductive layer part is connected to the second conductive layer part by the first connection wiring by means of through holes in the inorganic insulating layer . a substrate comprising a display area and a peripheral area disposed outside of the display area, wherein the display area comprises a plurality of pixels; an inorganic insulating layer disposed in the display area, wherein the inorganic insulating layer comprises a groove disposed in a region between pixels of the plurality of pixels; an organic material layer filling the groove; a first connection wiring disposed on the organic material layer, wherein the first connection wiring overlaps the plurality of pixels and extends in a second direction; and a second connection wiring insulated from the first connection wiring, wherein the second connection wiring extends in a first direction that crosses the second direction; wherein the plurality of pixels comprises a first pixel and a second pixel disposed adjacent to each other in the second direction, wherein the first pixel comprises a first conductive layer part extending in the second direction and the second pixel comprises a second conductive layer part extending in the second direction, wherein the first conductive layer part and the second conductive layer part are below the first connection wiring and are separated from the first connection wiring by the inorganic insulating layer ; and wherein the first conductive layer part is spaced apart from the second conductive layer part by the groove with the organic material layer in the second direction and the first conductive layer part is connected to the second conductive layer part by the first connection wiring by means of through holes in the inorganic insulating layer . <EOS>