According to various embodiments, an electronic device comprises a housing comprising: a front surface plate; a rear surface plate spaced apart from the front surface plate opposite thereto; and a side surface member surrounding a space between the front surface plate and the rear surface plate, wherein at least a portion of the side surface member comprises at least one conductive portion disposed between a first nonconductive portion and a second nonconductive portion; at least one wireless communication circuit electrically connected to the conductive portion; a conductive plate disposed in the space, and comprising a slot having a longitudinal direction perpendicular to the conductive portion; a conductor disposed on the conductive plate; and at least one conductive member dividing the slot into a plurality of portions.