PbS thin films with corrugated structure were synthesized on glass substrates by dip coating. The surface of the films was found to be corrugated. XRD analysis confirmed the formation of crystalline PbS nanoparticles with average grain size 14nm. From thermo power measurements, the conductivity of the samples was found to be of n type. Band gap of the films was estimated as 1.7eV from absorption spectra.