An electronic device is provided. The electronic device includes a first housing including a first space and a conductive portion formed through at least a portion of a first side member, a second housing slidably coupled to the first housing in a first direction, at least partially overlapped with the first side member in a slide-in state, and including a second side member including a second space, a flexible display disposed to receive support from the first housing and the second housing and in which a display area at least partially varies when the electronic device is changed from the slide-in state to a slide-out state, a wireless communication circuit disposed in the first space and configured to transmit or receive a wireless signal in at least one frequency band through the conductive part, and a conductive wall fixed to at least a portion of the first housing and disposed to be electrically connected to a ground between the first side member and the second side member, wherein the conductive wall may be disposed to overlap the conductive portion when the first side member is viewed from the outside.

According to an embodiment of the disclosure, an electronic device may include: a front plate, a rear plate disposed opposite the front place, a side surface part surrounding at least a part of a space between a front plate and the rear plate, a support disposed in the space and laterally surrounded by the side surface part, communication circuitry configured to transmit and/or receive a signal having a selected or designated frequency band through a conductive unit comprising a conductive material having at least a part thereof included in the side surface part, a display disposed between the support and the front plate and visible through the front plate, a first circuit substrate electrically connected to the display, disposed between the display and the support, and that a display driving circuit is disposed thereon, a second circuit substrate electrically connected to the display, disposed between the display and the support, and that a touch controller IC is disposed thereon, a first conductive sheet having at least a part thereof disposed between the support and the first circuit substrate, and a second conductive sheet disposed in the support between the display and the support and including a first conductive area overlapping the first conductive sheet when viewed over the rear plate and a second conductive area extending from the first conductive area and overlapping the second circuit substrate.

An electronic device is provided. The electronic device includes a first housing including a first space and a conductive portion formed through at least a portion of a first side member, a second housing slidably coupled to the first housing in a first direction, at least partially overlapped with the first side member in a slide-in state, and including a second side member including a second space, a flexible display disposed to receive support from the first housing and the second housing and in which a display area at least partially varies when the electronic device is changed from the slide-in state to a slide-out state, a wireless communication circuit disposed in the first space and configured to transmit or receive a wireless signal in at least one frequency band through the conductive part, and a conductive wall fixed to at least a portion of the first housing and disposed to be electrically connected to a ground between the first side member and the second side member, wherein the conductive wall may be disposed to overlap the conductive portion when the first side member is viewed from the outside.