An apparatus for manufacturing a display device includes a first jig including a first side, the first side having a concave groove for receiving a cover window, wherein the cover window includes a first planar portion, a first curved portion and a second curved portion, wherein the first and second curved portions are disposed at opposite ends of the first planar portion in a first direction, a second jig including a planar side for receiving a display panel, wherein when the second jig is moved in a second direction crossing the first direction with the display panel on the planar side, the display panel is disposed between the first and second curved portions of the cover window, and a pair of third jigs for supporting the first and second curved portions of the cover window.