Sound-insulation air passing port

The utility model relates to a sound-insulation air passing port belonging to a ventilating device, in particular to an indoor ventilating device. The sound-insulation air passing port comprises a box body, wherein the front end and the back end of the box body are respectively provided with an air inlet and an air outlet, and a passage from the air inlet to the air outlet is an air passage. The utility model has the key technology that the inner wall of the box body is provided with baffle plates up and down in a staggered way, so that the air passage forms a roundabout air passage. The utility model has the beneficial effects that the utility model has the very good functions of noise reduction and sound insulation and enhances the comfort level of a dwelling environment.