embodiments relate to a foldable display apparatus including a hinge providing supporting for a bending area of a flexible display panel . the flexible display panel includes a first flat display area and a second flat display area at both sides of a bending display area . a first rear cover provides support for the first flat display area and has a first edge . a second rear cover provides support for the second flat display area and has having a second edge facing the first edge and parallel to the first edge . the hinge includes rear hinge covers longitudinally extending parallel to the first edge and the second edge , and elastic axis members coupling the plurality of rear hinge covers in an interlocking and rotatable manner . the elastic axis members are deformed as the rear hinge covers make a relative movement by bending of the hinge .