A display device includes: a common voltage line formed on a display unit and at an outer side of the display unit; a first insulating layer formed on a thin film transistor on the display unit; a pixel electrode formed on the first insulating layer; a liquid crystal layer including a plurality of microcavities formed on the pixel electrode; a common electrode spaced apart from the pixel electrode with the liquid crystal layer interposed therebetween; the common electrode contacting the common voltage line at the outer side of the display unit through a contact hole; a second insulating layer formed on the common electrode; a roof layer formed on the second insulating layer; an injection hole formed on the common electrode, second insulating layer, and roof layer; and an overcoat formed on the roof layer covering the injection hole and sealing the microcavity, wherein the roof layer covers the contact hole.