An electronic device is disclosed, including a hinge module, a first and second housing foldable about the hinge module, and a display spanning the housings. The display includes at least one polymer member, a flexible plate including a flexible portion that is bendable connecting first and second planar portions thereof. The flexible portion includes a plurality of support pieces spaced apart from each other via a plurality of slits, and a plurality of Velcro patterns extending lengthwise from the plurality of support pieces. The Velcro patterns of adjacent support pieces are disposed so as to be engaged with one another in a lattice form.