An electronic device according to an embodiment may include a housing, which includes a front structure and a rear structure attached to each other, and a touch screen display. The front structure of the housing may include a first plate facing a first direction and a side plate extending from the first plate. The first plate may have a first thickness. The side plate may have a second thickness larger than the first thickness. The side plate may include a first surface facing a peripheral portion of the rear structure. The rear structure may include a second plate facing a second direction opposite the first direction and a second surface facing the first surface. The first surface may face a third direction. The second surface may face a fourth direction. The third and fourth directions may be configured to differ from the first and second directions, respectively. The touch screen display may have at least a part exposed through at least a part of the first plate. Other various embodiments may be possible.