An electronic device of various embodiments of the present disclosure may include: a display, a side bezel including at least one conductive portion, and a printed circuit board disposed inside the side bezel. The printed circuit board may include an interposer, and a first printed circuit board and a second printed circuit board electrically connected through the interposer. The first printed circuit board may include a first fill-cut area, and the second printed circuit board may include a second fill-cut area corresponding to the first fill-cut area, and a ground or feeding unit comprising a conductive feed of an antenna using the conductive portion may be disposed in the first fill-cut area or the second fill-cut area.