Abstract: A transmitting/receiving apparatus for use in telecommunications is provided which makes the user hand-free and is free from such inconveniences as difficulty in utterance and howling and crosstalk between an earphone and a microphone, and which includes: a first ear-insertion body serving as an earphone; and a second ear-insertion body provided separately from the first ear-insertion body and serving as a microphone of a bone-conduction type.

Abstract: A transmitting/receiving apparatus to be used as fitted into an external auditory meatus is provided which ensures less inclusion of noise and less possibility of howling and allows the user to hear the voice of the communication partner clearly, and which comprises: a bone-conduction microphone (2) and a speaker (3) which are housed in a single casing (4), the casing (4) having a distal end portion to assume a distal position in the external auditory meatus, in which distal end portion the bone-conduction microphone (2) is disposed; a vibration-absorptive foamed material (6) surrounding the bone-conduction microphone (2); a hollow portion (2) provided between the foamed material (7) and the speaker (3) within the casing (4); and a through-hole (8) extending through a wall portion of the casing (4) at a location adjacent the distal end portion.