a pneumatic pogo stick is provided that utilizes compressed air like a spring to have a potentially higher power to weight ratio than a comparable coil spring pogo stick . the pneumatic pogo stick includes an elongate cylindrical housing which forms a cylinder . the housing is formed from a clear polycarbonate plastic . a top cap is attached to one end of the housing to form the top of an air chamber . a piston , slidable within the cylinder , forms the bottom of the air chamber . an elongate shaft is coupled to the bottom of the piston and is moveable therewith , extending from the distal end of said housing as the piston moves within the cylinder . a bottom bracket assembly is attached to the bottom of the housing and a bushing for maintaining the lateral position of the shaft relative to the housing is attached to the bottom bracket assembly . the bushing prevents the shaft from rotating relative to the housing . user foot supports are also attached to the bottom bracket for supporting the feet of the user and handle bars are attached to the top cap for grasping with the hands of a user . improvements are also provided to the piston and air shaft that allow for reduced hammering and a lower maximum compression ratio in order to provide relatively smooth jumping and landing while propelling a user to greater heights . examples of such improvements include a hollow air shaft and modifications to the shape and structure of the piston .