A display device includes: a first case and a second case connected to each other by a folding member; and a display panel that is at least partially disposed on a first surface of the first case, wherein a second surface of the first case is opposite to the first surface of the first case, wherein a third surface of the second case faces the second surface of the first case when the display device is in a folded state, and the third surface of the second case is coplanar with the second surface of the first case when the display device is in an unfolded state, wherein a first end portion of the display panel is fixed to the second case, and a position of a second end portion of the display panel is configured to change on the first surface of the first case.