An electronic device comprising: an electronic panel configured to be folded along a folding axis extending in one direction, wherein the electronic panel comprises: an insulating substrate; and a driving element on the insulating substrate, configured to be activated by an external electrical signal applied thereto, and comprising at least one of a display element for displaying an image and a sensing element for sensing an external input applied to the electronic panel; a flexible window member on a top surface of the electronic panel; a protective member on a bottom surface of the electronic panel, the protective member characterized by a base layer comprising a material that has a glass transition temperature higher than a glass transition temperature of polyethylene terephthalate; a cushion layer contacting a bottom surface of the base layer and having a porous structure; an adhesive member coupling the electronic panel to the protective member;a lower protective member between the insulating substrate and the adhesive member and comprising a polymer material; and an additional adhesive member contacting a bottom surface of the insulating substrate and a top surface of the lower protective member to couple the insulating substrate to the lower protective member, wherein the adhesive member contacts a bottom surface of the lower protective member. an electronic panel configured to be folded along a folding axis extending in one direction, wherein the electronic panel comprises: an insulating substrate; and a driving element on the insulating substrate, configured to be activated by an external electrical signal applied thereto, and comprising at least one of a display element for displaying an image and a sensing element for sensing an external input applied to the electronic panel; an insulating substrate; and a driving element on the insulating substrate, configured to be activated by an external electrical signal applied thereto, and comprising at least one of a display element for displaying an image and a sensing element for sensing an external input applied to the electronic panel; a flexible window member on a top surface of the electronic panel; a protective member on a bottom surface of the electronic panel, the protective member characterized by a base layer comprising a material that has a glass transition temperature higher than a glass transition temperature of polyethylene terephthalate; a cushion layer contacting a bottom surface of the base layer and having a porous structure; an adhesive member coupling the electronic panel to the protective member;a lower protective member between the insulating substrate and the adhesive member and comprising a polymer material; and an additional adhesive member contacting a bottom surface of the insulating substrate and a top surface of the lower protective member to couple the insulating substrate to the lower protective member, wherein the adhesive member contacts a bottom surface of the lower protective member. a base layer comprising a material that has a glass transition temperature higher than a glass transition temperature of polyethylene terephthalate; a cushion layer contacting a bottom surface of the base layer and having a porous structure; an adhesive member coupling the electronic panel to the protective member;a lower protective member between the insulating substrate and the adhesive member and comprising a polymer material; and an additional adhesive member contacting a bottom surface of the insulating substrate and a top surface of the lower protective member to couple the insulating substrate to the lower protective member, wherein the adhesive member contacts a bottom surface of the lower protective member.