This study was carried out to determine the effect of fungicides application (carbendazim, benomyl, thiram and tolclofos-methyl) on soil when used at the recommended rates and at duplicated rates on the fungi population in the bean plant rhizosphere. Results showed that tested fungicides caused significant reduction in the fungi population of rhizosphere bean plant when used at the both levels compared with control. The tested fungicides caused various inhibitory effects according to the application rate. However, the duplicated rate caused remarkable reduction in fungi population. This reduction continued 2 or 3 weeks when applied fungicides used at recommended or duplicated rates respectively.