A display device includes a display structure including a display panel and a touch sensing layer disposed on the display panel, the display panel including a display panel including a display area and a non-display area around the display area, and the touch sensing layer including a first portion overlapping the display area and a second portion overlapping the non-display area, a window structure disposed on the display structure, a bonding layer disposed between the display structure and the window structure, and a touch flexible circuit board electrically connected with the touch sensing layer, wherein the touch flexible circuit board includes a first substrate member connected to the second portion, and a second substrate member provided with an ultraviolet (“UV”) transmitting member transmitting UV light emitted from a side of the bonding layer and extending from the first substrate member in a predetermined direction.