An electronic device is provided. The electronic device includes: a first housing comprising a first support member facing in a first direction, a first rear cover facing in a second direction opposite the first direction, and a first side member surrounding a first space between the first support member and the first rear cover; a second housing; a hinge structure connected to the first housing and the second housing and configured to be folded about a folding axis; a first antenna structure disposed in the first space and configured to form a first electric field in the second direction; a second antenna structure disposed near the first antenna structure in the first space; and a conductive member disposed between the first antenna structure and the second antenna structure.