A display device including a casing, a frame member, a plate member and a display panel is provided. The frame member includes a frame body and a protruding column disposed on the frame body and protruded in a direction from the frame body towards the casing. The plate member is disposed on the frame body and has an opening, which allows the protruding column to pass through, wherein the protruding column fixes relative position between the frame body and the plate member. The display panel is disposed on the frame body.