A foldable display device includes a display panel including a foldable display area, and a first panel support member supporting the display panel, the first panel support member overlapping a first area of the display panel. The foldable display device includes a second panel support member supporting the display panel, the second panel support member overlapping a second area of the display panel, and a hinge device including base hinge devices coupled to the first panel support member and the second panel support member to guide folding and unfolding of the display panel with respect to virtual rotation axes.