An electronic device includes: a first housing; a second housing; a hinge device connecting the first housing and the second housing to be foldable relative to each other; and a flexible display supported by the first housing and the second housing, wherein the flexible display may include: a window layer; a display panel laminated under the window layer; a bending part bent from the display panel to a rear surface of the flexible display at a first edge of the flexible display; and a first filling member in a first space, within the electronic device, such as to surround at least a part of the first edge together with the bending part, wherein the first filling member is not within a second space between the window layer and the display panel.