A housing member and a flexible display device including the same are provided. A display panel includes a bending portion and non-bending portions provided on both sides of the bending portion; a body portion disposed under the display panel and includes a first frame and a second frame opposite to each other; and a connection portion connecting the first frame and the second frame to each other and defining a bending axis, the first frame and the second frame include facing surfaces including magnetic areas and a nonmagnetic area, the magnetic areas are spaced apart from each other by the nonmagnetic area, and two magnetic areas of the magnetic areas are disposed in the first frame and the second frame, respectively, and face each other, and have opposite polarities that attract the two magnetic areas.