According to an embodiment of the present invention, an electronic device may include: a foldable housing including a hinge structure, a first housing structure, and a second housing structure, wherein the hinge structure includes at least one first conductive portion, the first housing structure is connected to the hinge structure and includes a first surface oriented in a first direction, a second surface oriented in a second direction opposite the first direction, and a first side member surrounding at least a part of a space between the first surface and the second surface and including at least one second conductive portion, the second housing structure is connected to the hinge structure, includes a third surface oriented in a third direction, a fourth surface oriented in a fourth direction opposite the third direction, and a second side member surrounding at least a part of a space between the third surface and the fourth surface, and is folded onto the first housing structure about the hinge structure, the first surface faces the third surface in a folded state of the foldable housing, and the third direction is identical to the first direction in an unfolded state of the foldable housing; a flexible display extending from the first surface to the third surface; and a wireless communication circuit electrically connected to the first conductive portion in the folded state of the foldable housing, and electrically connected to the second conductive portion in the unfolded state of the foldable housing, wherein the wireless communication circuit is configured to transmit and/or receive a signal having a selected frequency. Various other embodiments may be possible.