The utility model relates to a atomizer and a mouthpiece thereof, which are arranged on the nozzle of a atomizer； the mouthpiece is a middle empty pipe.The utility model has a first end which is used for connecting with the nozzle of the atomizer, a second end which is far away from the first end and extends from the first end to the second end to form the pipe wall of the mouthpiece, wherein the mouthpiece is provided with a hole on the pipe wall near the first end, and the hole occupies 40% ~ 90% of the pipe wall area near the first end. In order to introduce more outside air to help the atomizer to push the medicine out into the living mouth, a certain rate of hole breaking can be occupied by the hole breaking and the wall of the mouthpiece tube.一種霧化器及其咬嘴，用以設於一霧化器之噴口上；咬嘴呈一中空管狀體，並具有一第一端而用以與霧化器之噴口連接、以及遠離第一端的一第二端，且由第一端延伸至第二端而形成咬嘴之管壁；其中，咬嘴於近第一端的管壁上設有破孔，破孔所占區域為近第一端的管壁區域之40%~90%間。俾藉由破孔及其於咬嘴管壁上占有一定的破孔率，以引進更多外界空氣幫助霧化器噴出之藥劑推送至活體口中。
