A foldable display device is provided, which includes a first rear housing and a second rear housing, a connection member, four slider members fixedly connected inside the first rear housing and the second rear housing, a support plate including a first support plate and a second support plate which are arranged inside the first rear housing and the second rear housing and fixedly connected to the corresponding slider members, and a front frame; wherein when in a folded state, a non-bending region of a flexible display screen is inclined at an angle relative to a housing of the display device.