An electronic device includes a display module, and a side housing surrounding a side surface of the display module and formed of a conductive material. A protection member covers a part of the side housing and the display module. The protection member includes a first portion facing the display module and a second portion facing the side housing. A first conductive member is disposed in at least a part of the first portion of the protection member and is formed of a conductive material. A second conductive member is disposed in at least a part of the second portion of the protection member, is connected to the first conductive member, and is formed of a conductive material. A separation space is disposed between the second conductive member and the side housing, and an antenna is electrically connected to the side housing such that the side housing functions as an antenna.