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