Abstract: A joint structure for an air nozzle contains a valve joint being connected on an air nozzle so as to fill air, and the air nozzle including outer threads defined around an outer peripheral side thereof. The valve joint includes: a body having a hole defined therein, an inlet communicating with the hole, and at least one orifice penetrating from an exterior environment to the hole; at least one limiting member secured and moving in the at least one orifice and having meshing teeth formed on one end thereof to correspond to the hole, the meshing teeth engaging with the outer threads of the air nozzle, and the limiting member having a defining segment arranged on another end thereof; and a controlling assembly fitted on the body and used to control the at least one limiting member to move in the at least one orifice.