An electronic device according to various embodiments includes: a housing; a plurality of metallic parts forming a portion of the housing; a clock generator disposed in the housing; and a processor is configured to sense a grip on the electronic device based on a current loop formed by a first signal generated by the clock generator and transmitted through a first metallic part and a second metallic part of the plurality of metallic parts, wherein the second metallic part is disposed adjacent to the first metallic part with a first separator disposed between the first metallic part and the second metallic part and configured to electrically separate the first metallic part and the second metallic part.