Adsorption experiments of amminenickel complex ion on porous glass are carried out at 298 K. It is considered that both ion-exchange and ligand substitution on porous glass do not influence each other because the amount of nickel adsorbed is independent of concentration of sodium ion. The total amount of silanol group exchanged is estimated by mass balance, and shows that both di-ion and tri-ion contributed to adsorption of nickel. The amount of nickel adsorbed by the adsorptive complex ion is calculated, then compared with concentrations of ammonia and complex ion. Results show that both di-ion and tri-ion depress the adsorption reaction of nickel, and that free ammonia decreases considerably the amount of nickel adsorbed.