Equipment used in this study was composed of air compressor, fluidization column, and fine particle collecting part. The compressed air was supplied by 30 HP compressor into the fluidization column which was an 0.1 m diameter and 3.5 m height. The pressure (100-500 kPa) was measured with a sensor and regulated by means of globe valves. The gas phase, pressurized air, was fed to the column (excess gas velocity, U-U_mf=0.05-0.25 m/s) through the distributor. The solid phase particle used was coal particles (188-875 ㎛). The obtained data can be analyzed by strange attractor, standard deviation, and Fractal dimension obtained from the stochastic analysis of local pressure fluctuations at room temperature in the pressurized fluidized bed. The strange attractor increases with increasing gas velocity and decreases with increasing pressure. A tendency defined from the trace of strange attractor and the Pox diagram represented that pressure was more important than gas velocity in these experimental conditions. Both standard deviation and Fractal dimension increase with increasing gas velocity but decrease with increasing pressure. Results obtained from stochastic analysis of pressure fluctuation source show the good correlation between strange attractor and standard deviation, and also between standard deviation and Fractal dimension.