An electronic device according to certain embodiments includes a housing, a first glass plate coupled to the housing and defining an inner space, the first glass plate including a peripheral portion including: a first, second, third, fourth, and fifth surface forming an edge of the glass plate, the first and fifth surfaces being substantially parallel and the third surface being substantially perpendicular to the first and fifth surfaces, a decorative layer formed of a first material, disposed on a first area of the fifth surface such that a second area disposed between the fourth surface and the first area is uncovered by the decorative layer, and a protective layer formed of a second material, covering the second surface, the third surface, the fourth surface, the second area of the fifth surface, and a part of the decorative layer.