Improvement in selectivity in the aromatization of n-C 4H 10 and n-C 5H 12 was investigated on Pt-incorporated H–Ga- or H–Zn-silicate (designated as H–Pt·Ga- or H–Pt·Zn-silicate) prepared by the addition of Pt at the stage of mixed gel formation for preparing the precursor of the crystals. The performance of these catalysts was compared with that on Pt-ion-exchanged H–Ga- or H–Zn-silicate (designated as Pt/H–Ga-silicate, Pt/H–Zn-silicate). The conversion of C 2–C 5 saturated hydrocarbons on H–Pt·Ga- or H–Pt·Zn-silicate was lower than that on Pt/H–Ga- or Pt/H–Zn-silicate, but still higher than that on Pt-free H–Ga- or H–Zn-silicate catalyst. On the Pt-incorporated catalysts, the selectivity to light aromatics and/or olefinic hydrocarbons increased, indicating that activities for cracking, alkylation of benzene ring, hydrogenation, and dehydrogenation caused by Pt could be moderated by incorporation of Pt into the crystals. On the other hand, activities of dehydrogenation and aromatization caused by Ga or Zn were exerted more explicitly. These are attributed to the difference of the Pt state between Pt-incorporated and Pt-ion-exchanged catalysts, which could be compared through measurements of CO adsorption and TEM observation.