Abstract: It is intended to provide a handset that can communicate clear conversations and that is superior in serviceability, even in work environments where wearing a helmet is required or in conditions where wearing a helmet or mask is required, such as when riding a two-wheel vehicle, performing construction work, or the like, and that includes a bone conduction speaker and a laryngophone that are detachable. The handset includes a bone conduction speaker 1 that uses a ceramic piezo element for transmitting a voice by utilizing a bone conduction sound, a laryngophone 2 that uses a ceramic piezo element for picking up voice vibrations around a throat, and connecting equipment 10n that detachably connects said bone conduction speaker and said laryngophone that processes signals, and that is provided with a transmission line that transmits signals sent and received for calls.