An electronic device includes a flexible display panel connected to a first housing and a second housing; and a flexible window that is coupled to one surface of the flexible display panel. The flexible window includes a deformation area that is deformable together with the flexible display panel around at least one folding axis. The flexible window includes a glass layer. A first polymer layer is disposed between the glass layer and the flexible display panel. An adhesive layer is laminated on the second surface of the glass layer. The adhesive layer includes at least one uneven structure formed on one surface that faces an opposite direction to the second surface of the glass layer and is at least partially overlapped with the at least one first curved-surface portion or the at least one second curved-surface portion. A second polymer layer is laminated on the adhesive layer.