Abstract: A respiratory mask for artificially ventilating a patient, having: a nose receiving chamber; first and second fastening tabs each being arranged on respective nose wing portions of the nose receiving chamber and a third fastening tab being arranged on a nose root portion of the nose receiving chamber. A respiratory mask arrangement can include such a respiratory mask; a hat arranged on the head of the patient; and fastening means which cooperate with the fastening tabs and with the hat in order to fix the respiratory mask to the head of the patient. A respiration system can include such a respiratory mask arrangement; and a respiration device for producing a continuous positive airway pressure. A packaging unit can include such a respiratory mask having a border with a peripheral groove; a sealing means which is arranged in the peripheral groove and a protective film for covering the sealing means.