Electrically conducting polymers were prepared through a systematic photopolymerization of polypyrrole with the incorporation of Group 1B metal particles. The structural and morphological properties of incorporated metal nanoparticles were examined with respect to the role of the metals ions, nature of substrates, exposure time, and monomer counterion ratios. Elemental analysis confirmed the identities of the particles with sizes on the order of hundreds of nanometers in diameter. A mechanism is proposed for the formation of metal nanostructure during photopolymerization.