An electronic device may include a housing; a sliding frame, at least a portion of which is drawn out from the housing in a first direction, or at least a portion of which is retracted into the housing in a second direction; a flexible display including a first region visible from the outside, and a second region extending from the first region and varying in size; and a bending member disposed on a rear surface of the flexible display, the bending member including a plurality of bars arranged in a certain interval. The bending member may include a first bar including at least one first locking part protruding in an inner direction of the electronic device.