Disclosed is an electronic device including a first housing including a first surface oriented in a first direction, a second surface oriented in a second direction opposite to the first direction, a first side surface at least partially surrounding a space between the first surface and the second surface, and a second side surface facing away from the first side surface, a flexible display including a first region oriented in a first direction and a second region extending from the first region, wherein the first region is configured to be expandable by causing at least a part of the second region to be oriented in the first direction based on a slide movement of at least a part of the housing, and an antenna module disposed adjacent to the second surface of the housing, the antenna module including a wireless charging antenna, and a module mounting unit configured to surround at least a part of the wireless charging antenna and to be movable in an internal space inside the housing such that the wireless charging antenna is located in a center of a width of the housing in response to a state of the electronic device according to expansion or contraction of a display region of the display.