Science project, Study of bacteria inhibition of silver nanoparticles form fruit shells fluidextract by green synthesis. Objective (1) to study the optimal ratio of silver nanoparticles synthesis from fruit In the inhibition of bacteria (2) to compare the effective in inhibiting bacteria of silver nanoparticles money synthesized by water extract of fruit (3) To compare the values of MIC and MBC silver nanoparticles from the water extracted from the bark of fruit types that affect the inhibition of bacteria best. The results of the study found that the most appropriate fruit rind is grapefruit Peel layers in the proper ratio, by the extraction of silver nanoparticles extracted from the inner bark of grapefruit can inhibit bacteria S.aureus E.coli Bacillus Salmonella by way of disc diffusion best is water orange peel extract in 30 ml o. Mixed with AgNO3 70 ml silver nanoparticles from the extraction of silver nanoparticles from pomelo peel extract have antibacterial ability than the silver nanoparticles from chemistry methods. When study the minimum inhibition concentration in infections (MIC) and the lowest concentrations to disinfect (MBC). silver nanoparticles from pomelo peel extract inner value and found that MIC MBC infections, and S.aureus E.coli Salmonella is the same, is 25% V / v. And the 50% V / V respectively. Bacillus infections show that Bacillus is MIC MBC equal and 3.125% V / V 6.25% and V / V respectively.