According to various embodiments, an electronic device may comprise: a housing comprising a front plate, a rear plate facing in the opposite direction to the front plate, and a side surface member surrounding the space between the front plate and the rear plate, the side surface member comprising a first side surface extending in a first direction and having a first length, a second side surface extending in a second direction perpendicular to the first direction and having a second length larger than the first length, a third side surface extending in parallel with the first side surface and having the first length, and a fourth side surface extending in parallel with the second side surface and having the second length; a display arranged between the front plate and the rear plate, at least a partial area of the display being exposed through the front plate, the display comprising a conductive plate; a printed circuit board arranged between the display and the rear plate, the printed circuit hoard comprising at least one conductive layer, the conductive plate and the conductive layer being electrically connected to each other; a first conductive pattern arranged between the printed circuit board and the rear plate; a second conductive pattern arranged between the printed circuit board and the front plate and, when seen from above the front plate, between the first side surface of the side surface member and the conductive plate; and a wireless communication circuit electrically connected to the first conductive pattern and the second conductive pattern and configured to transmit and/or receive a signal having a designated frequency. Various other embodiments may be possible.