The type transition in onset condition of turbulent fluidization in gas fluidized beds was investigated to obtain the relation representing more precise roles of physical properties of gas and solid particles. The type transition in onset condition of turbulent fluidization occurs at Archimedes number of 20.87 by type transition of bubble breakup. The maximum stable bubble diameter (dbmax) is greater than the equilibrium bubble diameter (dbeq) in the region, Ar< 20.87, but dbeq>dbmax in the region, Ar>20.87. Therefore, the onset of turbulent fluidization is determined in the region, Ar<20.87, by dbeq and in the region, Ar>20.87, by dbmax as the limit of bubble growth. The uc decreases in the region, Ar<20.87, but increases in the region, Ar>20.87 as temperature increases.