a therapeutic device for improving the respiration of a patient , the device comprising a curved or kinked pipe section , into the first end of which a mouthpiece provided with a passage is disposed , a holding peg inserted into a second end of the pipe section and connected thereto , the holding peg having a passage disposed therein and being insertable into the inside of the pipe section , and a flexible hose attached to the holding peg inside the pipe section , a free end of the hose moveable freely in an area of the mouthpiece between an inner wall of the pipe section , such that the therapeutic device can be used during inhalation and exhalation , the device enabling the patient to train his respiratory passageways both during exhalation and inhalation , thereby to improve the effectiveness of respiration .