To provide a device with high bending durability and provide a diver with a convenience to use.

This device is provided with a primary side part 15 with one end connected to a primary regulator 11, a secondary side part 20 incorporating a humidity adjusting part 21 for humidifying compressed air for respiration and a filter part 22 for purifying compressed air for respiration and having one end connected to a hose 42 communicated with a secondary regulator 40, an angle variable joint mechanism 30 for connecting the other end of the primary side part 15 and the other end of the secondary side part 20 in sealed states to prevent compressed air for respiration from leaking and capable of relatively bending and varying an angle and a shock absorbing mechanism 35 constituted by arranging a damper 36 between the primary side part 15 and the secondary side part 20 so as to limit bending of the angle variable joint mechanism 30.