The present disclosure provides a foldable display device, which includes a front frame, a bottom frame assembly, a display panel and a support plate. The support plate includes a bending area and non-bending areas, a plurality of holes arranged in an array are provided in the bending area, the hole incudes two curved side walls arranged oppositely, and the side wall includes at least one curved portion, so as to improve the extension performance and the ability to restore deformation of the bending area of the support plate, and reduce the risk of separation of the inner film layer of the foldable display device.