The utility model discloses a telephone transmitter which can convert the sound into an electrical signal. The structure comprises a casing body and a sound collecting head. The utility model is characterized in that the casing is made of sound absorption material, a deep and thin tunnel from the outside to the inside is arranged on the casing, the sound collecting head is arranged at the bottom of the deep and thin tunnel and wrapped by the casing body, and the signal transmission wire of the sound collecting head is led out of the casing. The casing body can wrap the sound collecting head directly, and also can wrap through an inside tunnel tube. Compared with the prior art, the utility model can efficiently isolate the foreign sound, the received sound is more clear, the quality of the telephone transmitter is improved, the cost is reduced, and the sound volume of the speaker can be decreased, thus less effort is taken by the speaker and the far and near distance receiving can be combined, and the utilizing range is enlarged.