A foldable display device includes: a flexible display module including a bendable area having a folding axis and substantially planar members respectively located at opposite sides of the bendable area; and a support disposed on the flexible display module and including a hinge portion and support members, each of the support members being rotatably supported by one of opposite sides of the hinge portion, wherein at least a portion of the folding axis overlaps at least one of the support members in a plan view.