Abstract: A headset of the invention can achieve high-quality sound reproduction over a wide band while allowing sound from the outside to be sufficiently heard. The headset includes at least one vibrator configured to vibrate in accordance with an electric signal. The headset also includes at least one diaphragm each being associated with the respective vibrator. The headset also includes a holding unit that, when worn on a head of a user, holds the diaphragm such that at least part of the diaphragm is spaced from a side surface of the head by a predetermined distance. When the headset has two diaphragms, the holding unit may also function as a linking member that links the two diaphragms.