A device includes: a first housing, a second housing rotatably connected to the first housing, a display panel, a partial area of which is deformed by rotation of the second housing with respect to the first housing, a support plate disposed on the rear surface of the display panel and having a first area corresponding to the deformable area of the display panel and including openings formed at specified intervals, and a second area excluding the first area, a cushion layer disposed on the rear surface of the support plate at a position corresponding to the second area and including an impact absorbing material, a blocking member comprising flexible material disposed on the rear surface of the support plate and configured to be elongated according to deformation of the display panel, and a reinforcing plate disposed under the cushion layer and the blocking member.