An electronic device is provided. The electronic device includes a housing including a front plate, a rear plate facing in a direction opposite the front plate, and a side member including a support member surrounding a space between the front plate and the rear plate and at least partially extending to the space; a printed circuit board disposed between the rear plate and the support member; an electrical structure disposed around the printed circuit board and includes at least one extension portion at least partially overlapping the printed circuit board when the front plate is viewed from above; and at least one fastening member configured to simultaneously pass through the at least one extension portion and the printed circuit board and fasten to the support member.