In order to treat snoring and obstructive sleep apnea, the inner respiratory tract is subjected to atmospheric pressure and the outer surrounding area of the respiratory tract is subjected to artificial low-pressure, the difference between the inner atmospheric pressure and the outer low-pressure remaining constant. The respiratory therapy device consists of a pressure stable hollow body which surrounds the human body while keeping free the natural respiratory opening. Set hollow body forms the low-pressure chamber (7) is connected to a suction pump (3) by a suction tube (2). The invention method and respiratory therapy device make it possible to breathe in a free atmosphere.