The invention provides a flexible display device, and relates to the field of display. The flexible display device is used for solving the problem that a flexible display screen is likely to be damaged due to the fixing mode of an existing flexible display device under the folded state. The flexible display device comprises a flexible display screen, a supporting component and a handwriting pen; the supporting component is attached to the non-display face of the flexible display screen; the handwriting pen is used for performing manual input on the flexible display screen; the flexible displaydevice comprises a first end and a second end opposite to the first end, a first groove is formed in the portion, at the first end, of the supporting component, a second groove is formed in the portion, at the second end, of the supporting component, the first groove and the second groove are formed in the side, away from the flexible display screen, of the supporting component, the flexible display device can be folded, the handwriting pen can be clamped into the first groove and the second groove and used for fixing the flexible display device under the folded state. The handwriting pen isadopted for fixing the flexible display device, the problem of containing the handwriting pen is solved, the fixing process is simplified, and meanwhile damage to the flexible display screen is avoided.