A body position valve device, air ventilation control device (200), and respiratory mask apparatus (20). The body position valve device comprises: a connection interface (240) capable of communicating with a mouth and/or nose of a patient and a body position valve (230). The connection interface (240) is mounted on the body position valve (230). When a patient turns over from a supine position to the left to a first angle exceeding a first predefined value, the body position valve (230) is in a communicating state. When the patient turns over from the supine position to the right to a second angle exceeding a second predefined value, the body position valve (230) is in the communicating state. When the body position valve (230) communicates, the connection interface (240) can communicate with external air via the body position valve (230). The body position valve (230) has enhanced adaptability, and can adapt to a lateral recumbent position of an obstructive sleep apnea hypopnea syndrome (OSAHS) patient without causing a blockage in an air passage, and only a blockage is formed in the supine position. That is, when a patient turns over to a left side to an angle not exceeding the first predefined value or turns over to a right side to an angle not exceeding the second predefined value, a function of a valve component (220) on the worn respiratory mask apparatus (20) is unaffected and when the patient turns over to the left side to an angle exceeding the first predefined value or turns over to the right side to an angle exceeding the second predefined value, the patient experiences no or little resistance in inhalation or exhalation.Linvention concerne un dispositif de soupape de position corporelle, un dispositif de commande de circulation dair (200), et un appareil de masque respiratoire (20). Le dispositif de soupape de position corporelle comprend : une interface de liaison (240) apte à communiquer avec la bouche et/ou le nez dun patient et une soupape de positio
