Provided is a respiratory monitor device, relating to the field of medical devices. The respiratory monitor device comprises an external pipe and a monitor, and the external tubing is detachably connected to the monitor; the external tubing is provided with an air inlet and an air outlet, the air inlet is communicated with the air outlet by means of a cavity of the external tubing, and the external tubing comprises a plurality of first through holes; the monitor comprises a plurality of second through holes, the plurality of first through holes and the plurality of second through holes are communicated in one-to-one correspondence when the external tubing and the monitor are connected, and the monitor is used for detecting gas entering the monitor from the through holes.