To investigate the hydrodynamic characteristics of gas-liquid-solid fluidized beds considering the phase contact and flow phenomena of individual phase, fractal analysis has been adopted to manipulate the pressure fluctuation signal from the fluidized bed. The pressure fluctuation signals were measured in a gas-liquid-solid fluctuation signal from the fluidized bed. The pressure fluctuation signals were measured in a gas-liquid-solid fluidized bed of 0.152m×2.5m acryle column. The size of fluidized particles was in the range of 0-6.0×10^-3(m), and the gas and liquid flow rates were in the range of 0-10.0×10^-2(m/s) and 4.0-16.0×10^-2(m/s), respectively. The pressure fluctuation signals which were measured at a steady state were analyzed in terms of Rescaled Range analysis(R/S analysis) based on the concept of fractional Brownian motion, yielding the Pox diagram where the Hurst exponent and eventually local fractal dimension could be obtained. From the fractal analysis of the signals, the hydrodynamic charateristics of gas-liquid-solid fluidized beds could be described by means of the Hurst exponent; the Hurst exponent decreased with an increase in the gas flow rate, but it increased with an increase in the fluidized particle size. However, it exhibited a maximum with an increase in the liquid flow rate.