Air filter

The utility model provides an air filter and relates to the technical field of air filters. The air filter comprises an upper shell, a lower shell and a filter element, the upper shell is provided with a plurality of first mounting grooves and exhaust ports, and the exhaust ports are formed in the middles of the first mounting grooves; the lower shell is provided with a plurality of second mounting grooves, and the second mounting grooves correspond to the first mounting grooves; a plurality of filter elements are adopted, one port of each filter element is fixedly connected into the first mounting groove and communicated with the exhaust port, and the other port of each filter element is fixedly connected into the second mounting groove. The air filter solves the technical problems that an existing air filter is poor in connection strength, the sealing performance is prone to being affected, and installation is not facilitated due to the fact that the existing air filter mostly adopts a large-size single-tub