An electronic device is provided. The electronic device includes a housing including a first plate, a second plate, and a side member, a metal structure of which a part is connected to the side member, and a printed circuit board. The side member includes a first conductive portion, a second conductive portion, a third conductive portion, a first segment formed between the first conductive portion and the second conductive portion, and a second segment formed between the first conductive portion and the third conductive portion. The first conductive portion is connected to a first ground part disposed on the printed circuit board through a first path, and is connected to a second ground part disposed on the metal structure through a second path spaced from the first path by a specific distance.