Abstract: A positive airway pressure device is used to solve the problem of inconvenient use of the known positive airway pressure device and comprises: a tube including an inner end hole and an outer end hole intercommunicating with the inner end hole, with the outer end hole being smaller than the inner end hole, with the tube adapted to be inserted into a nasal cavity; and a two-way valve located in the tube, with the two-way valve moving axially between the inner end hole and the outer end hole, and with the two-way valve including a fluid passage intercommunicating with the inner end hole and the outer end hole.