A toy gun includes a gun body, an action assembly, and a pressure diverter. The gun body includes a barrel and a gas flow conduit. The action assembly is installed on the gun body and includes a piston. The pressure diverter is received in the gun body and arranged between the barrel, the gas flow conduit, and the piston. The gas diverter includes a gas collection cavity and an inlet hole, a first outlet hole and a second outlet hole communicating to the gas collection cavity. The inlet hole is arranged corresponding to the gas flow conduit, the first outlet hole is arranged corresponding to the barrel, the second outlet hole is arranged corresponding to the piston. The cross-sectional area of the first outlet hole is greater than that of the second outlet hole.