Crystallization process of ZSM-5 zeolite from dilute silicate-aluminate solution was studied. Crys-tallization curves, pH change of reactant, and size distribution of final product were examined at 150-195℃. the crystallization curve can be simulated adopting optimum rate constant for linear growth, if the crystal is growing from nuclei formed during induction period with the constant growth, if the crystal is growing from nuclei formed during induction period with the constant growth rate and the fraction of soluble species is constant till all amorphous reactant is dissolved. The rate constants for linear growth are determined as 0.009㎛ㆍmin^-1 at 150℃, 0.038㎛ㆍmin^-1 at 175℃, and 0.092㎛ㆍmin^-1 at 195℃.