A display device includes: a first non-folding area; a second non-folding area; and a folding area to be folded relative to a folding axis, and between the first non-folding area and the second non-folding area; a display module; and a support module underneath the display module. The support module includes: a base layer including a base fiber, the base fiber including a glass fiber, a carbon fiber, or an aramid fiber; and a support layer including: a first sub-support portion corresponding to the first non-folding area, the first sub-support portion being located above and underneath the base layer; and a second sub-support portion corresponding to the second non-folding area, the second sub-support portion being located above and underneath the base layer. The first sub-support portion and the second sub-support portion includes a support portion resin including at least one of an acrylic resin, an epoxy resin, or a urethane resin.