The invention discloses an inflator air nozzle assembly convenient to use, characterized by comprising a housing and a nozzle element assembly for threaded connection with a tire nozzle, the housing is fixedly connected with an exhaust end of the inflator, the nozzle element assembly is rotatably disposed inside the housing and in communication with the exhaust end of the nozzle element assembly, a ratchet wheel transmission mechanism is disposed between the nozzle element assembly and the tire nozzle; the invention has the advantages that a user can inflate a tire without stretching hands between two steel wires of a tire so as to turn the inflator's nozzle and then just by holding a body of an inflating barrel or an exhaust pipe, facilitating and quickening the usage; an arm of force application is lengthened, saving labor to certain degree; in addition, the inflator nozzle assembly can be used in smaller tire spaces.