A holder for a portable wireless instrument has a pocket portion to contain the portable wireless instrument. The wireless instrument has a vibration function announcing an incoming call. A band portion fastens the pocket portion on an arm of a wearer. A vibration transmitting member is arranged on the rear portion. Both sides of the vibration transmitting member project from the inside and the outside of the rear portion of pocket. Thus, the vibration transmitting member contacts the holder for a portable wireless instrument and the arm of a wearer. Vibration of the portable wireless instrument is transmitted to the arm of a wearer of the portable wireless instrument via the vibration transmitting member.