Abstract: The present invention provides a telephone handset holder which engages a mobile telephone handset and is provided with means for clipping the holder to the shoulder strap of a seat belt, preferably so that the handset is oriented toward the user's ear when in position for use. In the preferred embodiment the holder is slidably mounted to the shoulder strap, fixed in position by frictional engagement, and can be slid to the most comfortable position for use. When the telephone is not in use the handset can be slid down the shoulder strap to lap level for temporary storage, without removing the handset from the holder and without detaching the holder from the shoulder strap.