A display device includes a first body including a first internal space and a first opening at a first side of the first body, a second body including a second internal space and a second opening at a first side of the second body, the second opening facing the first opening, a flexible display panel to display images, the flexible display panel having a changeable display area in accordance with a distance between the first and second bodies, and an arm assembly including a plurality of connecting arms supporting the first and second bodies, the plurality of connecting arms being rotatably coupled to the first and second bodies.