An air rifle including a supporting frame, a barrel, a pneumatic assembly, an air storage assembly, and a firing assembly. The barrel, the pneumatic assembly, the air storage assembly, and the firing assembly are all disposed on the supporting frame. The pneumatic assembly is connected to the air storage assembly. The air storage assembly includes an air cylinder, an air valve disposed at one side of the air cylinder, and a plastic member disposed at a connection part of the barrel and the air valve. A firing pin is fixed on the tail of the plastic member. The firing assembly includes a trigger support fixed on the supporting frame, a pushrod disposed on the trigger support, a trigger, a trigger buckle, and a hammer. The trigger is connected to the trigger buckle. The pushrod is adapted to slide on the trigger support.