In this study, the ability of modified mesoporous silica material SBA-15 with amino functional group (–NH2) to remove Pb(II) ions from aqueous solutions was investigated by batch technique. It was found out that: (i), the hybrid silica samples are efficient sorbents for the removal of Pb(II) ions from aqueous solutions. The largest sorption capacity was archived on the sorbent prepared using TEOS/APTES molar ratio of 3.3, because it still has very large specific surface area. (ii), The optimum pH value for removal Pb(II) ions from aqueous solution ranged from 5 to 6 and the lead adsorption approached equilibrium state in short time of about 60 min. (iii), The abilities of the sorbents were found to be closely related with the sorbent’s pore structure, pore density, and the accessibility of the grafted amino groups. (iv), the mechanism proposed for lead adsorption on the siliceous sorbents modified with –NH2 groups are probably through van der Waals electrostatic interaction of Pb(II) ions with surface –NH2 groups.