An electronic device of various embodiments of the disclosure may include: a housing, a wireless communication circuit disposed inside the housing and configured to transmit and/or receive a signal of a specified frequency by feeding to at least a part of the housing, and a display structure coupled to the housing. The display structure may include: a cover glass coupled to the housing and forming at least a part of a front surface of the electronic device, a display panel disposed adjacent to one surface of the cover glass, a first layer including a dielectric material disposed under the display panel, and having a first edge spaced apart from the first side surface by a first distance, and a second layer disposed under the first layer, wherein a second edge of the second layer corresponding to the first edge of the first layer is spaced apart from the first side surface by a second distance less than the first distance. An edge of the display panel corresponding to the first edge of the first layer may be spaced apart from the first side surface by a third distance greater than the second distance and less than the first distance.