Nanotechnology or using technology in the case of atoms and molecules is one of the most important techniques in present century, which will affect on future of world economy. This study was designed to examine the Nanoparticles synthesis and effects of silver nanoparticles (0, 0.5,1,5,10,25,40 ppm) on morphological and physiological indexes of basil(Ocimum basilicum L.). Measurement of root and shoots dry weight and lenght showed that increasing of Silver nanoparticles concentrations have an adverse effect on them. Also our results showed that by increasing silver nanoparticles concentration, the amount of soluble sugars increase. The activities of antioxidant enzymes, which play an important role in detoxification of reactive oxygen species in cells, were measured in leaf treated with Silver nanoparticles and the result showed increase in peroxidase Guaiacol and catalase amount and its reason can be found in the effect of different results of silver nanoparticles in different concentrations on morphologic and physiologic of basil plant.