A method of manufacturing a display device includes: disposing a member having a first alignment mark and a second alignment mark spaced apart from the first alignment mark on a stage; adsorbing the member to an upper surface of the stage; capturing an image of the member with a camera disposed on the stage; comparing a captured phase of the second alignment mark with a first preset phase of the second alignment mark; adsorbing the member to a bending part disposed apart from the stage; and bending the member with the bending part.