According to certain embodiments, an electronic device comprises: a housing including a first support member; a cover member coupled with and facing the first support member; a second support member coupled with and facing the first support member; a printed circuit board assembly disposed to face the first support member, the printed circuit board assembly having a part disposed between the first support member and the cover member and another part disposed between the first support member and the second support member; wherein the printed circuit board assembly comprises: a first circuit board including a first part disposed between the first support member and the cover member, and a second part disposed between the first support member and the second support member; a second circuit board disposed to at least partially face the first part and disposed between the first circuit board and the cover member; and an interposer board disposed to correspond to at least a part of an edge of the second circuit board and coupling the second circuit board with the first circuit board, and wherein the second support member biases a part of the edge of the second circuit board.