Abstract: An integrated structure of a barrel and an air storage pipe of an air gun is provided. The air storage pipe is fixedly connected with a first connecting member and a second connecting member. The barrel is fixedly connected between the first connecting member and the second connecting member. The air storage pipe, the first connecting member, the second connecting member and the barrel cooperate to form an air storage area. The air storage area is located between the first connecting member and the second connecting member and communicated with an inflation head through an air supply passage disposed in the second connecting member. The layout of the air storage pipe and the barrel is more reasonable to prolong the service life of the air gun and to enhance the shooting accuracy.