A　facile　strategy　was　used　to　synthesize　highly　ordered　mesoporous　silica　SBA-15　functionalized　with　high　concentration　of　amino　groups,　which　seems　to　be　rather　difficult　to　be　incorporated　into　mesoporous　silica　without　disrupting　the　ordered　mesoscopic　structure　compared　to　other　functional　groups.　The　pore　structure　of　functionalized　materials,　together　with　the　presence　and　accessibility　of　functional　groups,　were　investigated　in　detail.　It　is　shown　that　amino　groups　are　attached　covalently　to　the　pore　wall　of　SBA-15　and　the　ordered　mesoscopic　architecture　of　the　functionalized　samples　remains　almost　intact　even　with　a　large　concentration　of　aminopropyltriethoxysilane　(APTES)　up　to　30mol%　in　the　initial　synthetic　mixture.　The　samples　with　20mol%　APTES　in　the　initial　reaction　mixture　still　preserve　a　desirable　pore　structure,　with　a　surface　area　of　680　m(2)center　dot　g(-1)　and　a　pore　volume　of　0.89　cm(3)　center　dot　g(-1).　Furthermore,　the　functional　groups　in　such　a　porous　structure　are　readily　accessible　and　show　a　large　affinity　for　nickel(II)　ion,　with　a　Ni2+　adsorption　capacity　of　1.88　mmol　center　dot　g(-1),　whereas　no　Ni2+　adsorption　takes　place　with　unfunctionalized　mesoporous　silica.　The　amount　of　amino　groups　incorporated　increase　as　the　APTES　concentration　further　increases　to　30mol%,　but　the　amino　groups　are　less　accessible　due　to　the　dramatic　decrease　in　the　porosity　of　functionalized　samples.