According to an aspect of the present invention, a flexible display device comprises a flexibility substrate; a display unit located on the flexibility substrate and including a display region to realize an image; and a thin film encapsulation layer to seal the display unit and including at least one inorganic encapsulation film and at least one organic encapsulation film. The organic encapsulation film comprises at least one first organic region including a first organic material, and at least one second organic region including a second organic material which is different from the first organic material. The first organic region is extended in a straight line along a first direction. The first organic region and the second organic region are arranged side by side. A first Youngs modulus of the first organic region can be different from a second Youngs modulus of the second organic region.
