PbS nanoparticles embedded in a novel silica glass have been achieved in the present sutdy by sol-gel processing. Their fluorescence properties have been evaluated nand compared with those of un-doped glass. A novel luminescent phenomenon has been observed from the composite of PbS nanoparticles and the sol-gel silica glass. The photoluminescence (PL) spectrum of the comosite consists of two emission peaks (440 and 605 nm). The Pb2+ions in the sol-gel silica glass show sharp emission band. This novel luminescene form the samples isassigned to the composite structure of Pbs nanoparticles and porous silica glasses.