An electronic device according to various embodiments of the disclosure may include a first housing, a second housing, a flexible display, a bendable member, and a bending plate. The second housing may slide in a first housing to cause at least a part of the second housing to be drawn out of the first housing in an open state, and may slide in a second direction to cause the at least a part of the second housing to enter the first housing in a closed state. The flexible display may be disposed in a space formed by the first housing and the second housing, and may include a first area visible to an outside, and a second area extending from the first area, accommodated inside the flexible display in a closed state, and visible to the outside in an open state. The bendable member may be disposed on a rear side of the flexible display to support the flexible display in the closed state and in the open state, and may include a plurality of multi-bars disposed at predetermined intervals. The bending plate may be attached to the flexible display and the plurality of multi-bars.