An electronic device is provided. The electronic device includes a housing including a side member, a support member, a display, an antenna module including one or more patch antennas, a printed circuit board (PCB), a wireless communication circuit disposed on the PCB, a first conductive member, a first connector, a second connector, and a protrusion extending from the first end of the first conductive member toward an interior of the housing, and electrically connected to the first conductive member. The antenna module is disposed at locations corresponding to a first opening defined by the first conductive member, the support member, the first connector, and the second connector, and a second opening defined by the first conductive member, the support member, the first connector, and the protrusion, and the wireless communication circuit is electrically connected to the protrusion and the antenna module.