Muffling structure for pneumatic tool

A muffling structure for a pneumatic tool, with the muffling structure disposed in an exhaust pipe of the pneumatic tool, the muffling structure comprising:

• an outer cylinder extending along the exhaust pipe and spaced apart from the exhaust pipe by an outer gap channel, wherein an inlet end and an outlet end are defined at the outer cylinder, the outlet end having a stop portion;
• and
• an inner cylinder extending along the exhaust pipe and defined with an upstream end and a downstream end, the downstream end passing the inlet end to protrude into the outer cylinder and abut against the stop portion, whereas the upstream end protruding from the inlet end and having a baffling plate extending laterally, the baffling plate having an area greater than or equal to that of the inlet end and being spaced apart from the exhaust pipe by a gap, wherein an inner gap channel is formed between the inner cylinder and the outer cylinder, and a communication opening whereby the outer gap channel and the inner gap channel are in communication is formed between the baffling plate and the inlet end.