The flexible display device may include a display panel, including a display area, a non-display area and a bending area, bent in a rear direction so that one edge of the display panel has a predetermined curvature, a first back plate and a second back plate, disposed on a rear surface of the display panel, a cushion tape disposed on a rear surface of the first back plate, and a fixing tape, disposed between the cushion tape and the second back plate, made of an adhesive layer in the bending area. Accordingly, there is an effect of improving the quality of the flexible display device by reducing the peeling defect of the bending area.