To cut off noise at a noisy location and to attain efficient hand-free speech with excellent speech quality by using a bone conduction microphone for a transmitter of an earphone type handset.

An earphone type handset 5 includes a bone conduction microphone detecting a bone conduction voice signal and transducing the sign into an electric signal and a speaker to sound the reception voice signal. A changeover control switch 7 is used to select the earphone type handset 5 or a handset 9 of a telephone set 8. The selection to the earphone type handset 5 is displayed on a changeover display section 10. An interface section 6 acts as an interface for the earphone type handset 5.