Abstract: A pneumatic hammer has a housing, a handle, an air passage, a sleeve, a cylinder, an actuating head, a reciprocating valve and two buffers. The handle extends from the housing. The air passage is defined in the handle and communicates with the housing. The sleeve communicates with the housing and is slidably mounted in the housing. The cylinder is securely mounted in the sleeve. The actuating head is slidably received in the cylinder. The reciprocating valve is mounted on one end of the cylinder. A buffer abuts each end of the sleeve to provide a shock absorbing effect to the sleeve. Consequently, the shock caused by the actuating head will not be directly transmitted to the housing and handle. The control of the pneumatic hammer can be improved. In addition, an annular recess not aligning with the air passage is defined in the outer periphery of the sleeve and at least one inlet port is defined in the face defining the recess.