The present invention relates to a tuneable clarinet barrel joint (1) for arrangement between the mouthpiece and the upper joint of a (Eb, D, C, A or Bb) clarinet, with a longitudinal axis (L) and a bore (100) which runs in the longitudinal axis (L), whereby the clarinet barrel joint (1) is comprised of an upper part (2) and a lower part (3), which are arranged for connection in the longitudinal axis (L), and provided with a set collar (4) for the connection of the upper part (2) and the lower part (3), by means of which the distance between the upper part (2) and the lower part (3) is adjustable, characterized in that the set collar (4) is connected to both the upper part (2) and the lower part (3) by means of screw threads (6, 7), whereby the said screw threads (6, 7) are pitched with opposing directions of rotation.