A flexible display device, comprising a display area (1) and a non-display area (2) surrounding the display area (1), wherein the display area (1) comprises a main display area (11) on the front face of the flexible display device, and a first side display area (12) and a second side display area (13) on the left and right side faces of the flexible display device; and the non-display area (2) comprises a first bezel (21) and a second bezel (22) on the back face of the flexible display device. By means of the flexible display device, the side face display of the flexible display device can be realized, and the first bezel (21) and the second bezel (22) can also be hidden at the back face of the flexible display device, thereby implementing a bezel-less flexible display device.