An electronic device, comprising: a first housing structure including: a first surface facing in a first direction, a second surface facing in a second direction opposite to the first direction, and a first side surface member at least partially surrounding a space between the first surface and the second surface; a second housing structure including: a third surface facing in a third direction, a fourth surface facing in a fourth direction opposite to the third direction, and a second side surface member at least partially surrounding a space between the third surface and the fourth surface; a hinge structure rotatably connecting the first housing structure and the second housing structure, the hinge structure providing a folding axis on which the first housing structure and the second housing structure rotate, the hinge structure including a first hinge plate mounted inside the first housing structure and a second hinge plate mounted inside the second housing structure; at least one flexible printed circuit board crossing the first hinge plate and the second hinge plate and extending from an inside of the first housing structure to an inside of the second housing structure; and at least one elastic member disposed on at least one of the first hinge plate or the second hinge plate in a position adjacent to the folding axis, wherein the elastic member is at least one of: disposed between the first hinge plate and the at least one flexible printed circuit board, or disposed between the second hinge plate and the at least one flexible printed circuit board. a first surface facing in a first direction, a second surface facing in a second direction opposite to the first direction, and a first side surface member at least partially surrounding a space between the first surface and the second surface; a second housing structure including: a third surface facing in a third direction, a fourth surface facing in a fourth direction opposite to the third direction, and a second side surface member at least partially surrounding a space between the third surface and the fourth surface; a hinge structure rotatably connecting the first housing structure and the second housing structure, the hinge structure providing a folding axis on which the first housing structure and the second housing structure rotate, the hinge structure including a first hinge plate mounted inside the first housing structure and a second hinge plate mounted inside the second housing structure; at least one flexible printed circuit board crossing the first hinge plate and the second hinge plate and extending from an inside of the first housing structure to an inside of the second housing structure; and at least one elastic member disposed on at least one of the first hinge plate or the second hinge plate in a position adjacent to the folding axis, wherein the elastic member is at least one of: disposed between the first hinge plate and the at least one flexible printed circuit board, or disposed between the second hinge plate and the at least one flexible printed circuit board. a third surface facing in a third direction, a fourth surface facing in a fourth direction opposite to the third direction, and a second side surface member at least partially surrounding a space between the third surface and the fourth surface; a hinge structure rotatably connecting the first housing structure and the second housing structure, the hinge structure providing a folding axis on which the first housing structure and the second housing structure rotate, the hinge structure including a first hinge plate mounted inside the first housing structure and a second hinge plate mounted inside the second housing structure; at least one flexible printed circuit board crossing the first hinge plate and the second hinge plate and extending from an inside of the first housing structure to an inside of the second housing structure; and at least one elastic member disposed on at least one of the first hinge plate or the second hinge plate in a position adjacent to the folding axis, wherein the elastic member is at least one of: disposed between the first hinge plate and the at least one flexible printed circuit board, or disposed between the second hinge plate and the at least one flexible printed circuit board. disposed between the first hinge plate and the at least one flexible printed circuit board, or disposed between the second hinge plate and the at least one flexible printed circuit board.