Hinged support member and flexible display device including the same

A display device includes first and second support members arranged along a first direction, a joint part therebetween, a hinge member adjacent to facing sides of the first and second support members that extends in a second direction crossing the first direction, and that includes two rotation axes, and a flexible display module on the first and second support members and the joint part. The joint part includes a first joint unit that extends in the second direction and a plurality of second joint units arranged in the first direction, where the first joint unit is interposed between the plurality of second joint units. The second joint units extend in the second direction, and each of the second joint units has recesses between side and top surfaces thereof and that extend in the second direction.