The mobile telephone disclosed in the present specification has a mobile telephone upper edge unit including a right-ear cartilage conduction unit, a left-ear cartilage conduction unit, and a linking unit linking the right-ear cartilage conduction unit and the left-ear cartilage conduction unit, the units being exposed at the mobile telephone surface; and a cartilage-conduction vibration source for transmitting vibration to the mobile telephone upper edge unit.