A respiratory device (1) includes a host (11), a pressure sensor (116) and a connecting module (12). The host (11) includes a first airflow channel (112) and a first shell (111). The first shell (111) includes a communication part (113) running through the first shell (111). The pressure sensor (116) is installed in the host (11) and connected with the communication part (113). The connecting module (12) includes a second airflow channel (121), a filter (122) and an airflow guiding part (123). The second airflow channel (121) is in communication with the first airflow channel (112). The filter (122) is used for filtering an airflow (130) from a breathing tube (13). A first end of the airflow guiding part (123) is in communication with the communication part (113), and the unfiltered airflow (130) is introduced into a second end of the airflow guiding part (123). A pressure level of the unfiltered airflow (130) is detected by the pressure sensor (116) through the communication part (113) and the airflow guiding part (123).
