A foldable display device includes a central connector, a first support structure, a second support structure, a cable, and a display panel. The central connector has an abutment post. The first support structure is pivoted to the central connector and includes a first recess, a first plate, a first support element, and plural first flexible elements. The second support structure is pivoted to the central connector and has a second recess, a second plate, a second support element, and plural second flexible elements. Two ends of the cable are respectively connected to one end of the first support element and one end of the second support element, and the cable abuts beneath the abutment post. A portion of the display panel is movably disposed over the first support structure, and another portion of the display panel is fixed on the second support structure.