An electronic device according to various embodiments of the disclosure may comprise: a housing; and a peripheral portion adjacent to the housing, an opaque layer, a protective layer, and a processed layer, a first glass plate coupled to the housing and defining an inner space therewith. The peripheral portion may comprise: a first surface facing the inner space in a first direction; a second surface extending from the first surface and facing the inner space in a second direction; a third surface extending from the second surface and adjacent to the periphery of the housing in a third direction; a fourth surface extending from the third surface and facing opposite the inner space in a fourth direction; and a fifth surface extending from the fourth surface, substantially parallel to the first surface, and facing opposite the inner space in a fifth direction. The opaque layer may be formed on a first area of the first surface and may be formed so as not to cover a second area between the first area and the second surface, and the protective layer may be formed so that a portion thereof covers a portion of the first surface and the non-transparent layer, and may also be formed so as to prevent and/or reduce shocks caused by contact between the peripheral portion and the periphery of the housing. The processed layer may be formed by surface processing on at least a part of an area of at least one of the second surface, the third surface, and the fourth surface.