Abstract: A training device for brass instrument musicians is disclosed which prevents the musician from exerting excess pressure to his lips by using the mouthpiece. The device includes a central piece for holding the brass instrument that limits movement of the instrument in a direction along the longitudinal axis of the mouthpiece towards the user's lips and further includes upper and lower portions with connecting support rods for securing the position of the central piece so that the mouthpiece cannot be pressed against the user's lips. In one disclosed embodiment the device includes upper and lower portions designed to contact the musician's head and body, thereby fixing the proximity of the central piece to the user's lips.