An electronic device (30, 600, 800) comprising: a foldable housing comprising a hinge structure (501, 630), a first housing structure connected to the hinge structure (501, 630) and comprising a first surface facing in a first direction, a second surface facing in a second direction opposite the first direction, and a first side member (311, 610, 810) surrounding at least a portion of a space between the first surface and the second surface and comprising at least one first conductive part (611, 621, 631), and a second housing structure connected to the hinge structure (501, 630), comprising a third surface facing in a third direction, a fourth surface facing in a fourth direction opposite the third direction, and a second side member (321, 620, 820) surrounding at least a portion of a space between the third surface and the fourth surface and comprising at least one second conductive part (612, 622, 632), and configured to be folded against the first housing structure around the hinge structure (501, 630), wherein the first surface faces the third surface in a folded state and the third direction is the same as the first direction in an unfolded state; a flexible display extending from the first surface to the third surface; and a wireless communication circuit electrically connected to the at least one first conductive part (611, 621, 631) and configured to transmit and/or receive a signal of a specified frequency, wherein the at least one first conductive part (611, 621, 631) and the at least one second conductive part (612, 622, 632) are electrically connected to each other in the folded state, wherein the electronic device (30, 600, 800) further comprises at least one conductive member (900, 1000) configured to electrically connect the at least one first conductive part (611, 621, 632) and the at least one second conductive part (612, 622, 632) between the at least one first conductive part (611, 621, 632) and the at least one second conductive part (612, 622, 632) in the folded state, wherein the first side member (311, 610, 810) comprises a first area forming a portion of the first surface, wherein the second side member (321, 620, 820) comprises a second area forming a portion of the third surface, wherein the at least one conductive member (900, 1000) electrically connects the first area and the second area in the folded state, wherein the at least one conductive member (900, 1000) is disposed in the first area and comes into contact with the second area while facing the same in the folded state, and wherein the second area has a recess into which the at least one conductive member (900, 1000) is inserted to come into contact with the same in the folded state. a foldable housing comprising a hinge structure (501, 630), a first housing structure connected to the hinge structure (501, 630) and comprising a first surface facing in a first direction, a second surface facing in a second direction opposite the first direction, and a first side member (311, 610, 810) surrounding at least a portion of a space between the first surface and the second surface and comprising at least one first conductive part (611, 621, 631), and a second housing structure connected to the hinge structure (501, 630), comprising a third surface facing in a third direction, a fourth surface facing in a fourth direction opposite the third direction, and a second side member (321, 620, 820) surrounding at least a portion of a space between the third surface and the fourth surface and comprising at least one second conductive part (612, 622, 632), and configured to be folded against the first housing structure around the hinge structure (501, 630), wherein the first surface faces the third surface in a folded state and the third direction is the same as the first direction in an unfolded state; a flexible display extending from the first surface to the third surface; and a wireless communication circuit electrically connected to the at least one first conductive part (611, 621, 631) and configured to transmit and/or receive a signal of a specified frequency, wherein the at least one first conductive part (611, 621, 631) and the at least one second conductive part (612, 622, 632) are electrically connected to each other in the folded state, wherein the electronic device (30, 600, 800) further comprises at least one conductive member (900, 1000) configured to electrically connect the at least one first conductive part (611, 621, 632) and the at least one second conductive part (612, 622, 632) between the at least one first conductive part (611, 621, 632) and the at least one second conductive part (612, 622, 632) in the folded state, wherein the first side member (311, 610, 810) comprises a first area forming a portion of the first surface, wherein the second side member (321, 620, 820) comprises a second area forming a portion of the third surface, wherein the at least one conductive member (900, 1000) electrically connects the first area and the second area in the folded state, wherein the at least one conductive member (900, 1000) is disposed in the first area and comes into contact with the second area while facing the same in the folded state, and wherein the second area has a recess into which the at least one conductive member (900, 1000) is inserted to come into contact with the same in the folded state.