The disclosure provides a foldable display device comprising a flexible display panel, a foldable mechanism, a support, and a driving mechanism. The driving mechanism includes two base plates and a fixing part. The flexible display panel is located on the two base plates. The flexible display panel when in an unfolded state is located on the fixing part. When the flexible display panel is in a folded state, a portion of the flexible display panel enters into a cavity of the fixing part through an opening.