The parameters influencing the formation of silver nanoparticles are reported. We used poly(vinyl alcohol) (PVA), maltose and silver nitrate as stabilizer, reductant and silver nanoparticles precursor, respectively. The formation of nanoparticles depended upon reaction temperature and pH of solution. The pH of solution controlled by HCl and NaOH. The reaction rate and amount of nanoparticles increase with increasing the reaction temperature. Also, formation of nanoparticles are influenced by pH. The size distribution and dispersion of Ag nanoparticles formed in PVA solution were observed by Transmission electron microscopy (TEM) and the reaction rate and amount of nanoparticles were characterized UV-vis spectrophotometer.