This study aimedtostudy thesusceptibility of some tomato plant varieties to some pests and predators population during two successive seasons Nili 2011 and 2012. The obtained results revealed significant differences between the populations mean of Bemisia. Tabaci (Genn.) immature stages on Meram and the two other cultivars, while there were no significant differences in population between Rawan and supper-gekal varieties. Also a significant difference between the populations' mean of Myzus persicae (Sulzer) on Tomato variety supper-gekal and the two others. The means number of Coccinella undecimpunctata and Scymnus syriacus were significant between Tomato cultivar supper-gekal and Rawan, while there were no significant differences in population between Rawan, and Meram varieties. In addition, the results reveled that, there are insignificant between the populations of Orius albidipennis on the three tested varieties. The differences between the population mean of Euseius scutalis Athias-Henriot appeared no significant on the three tested tomato varieties. The data indicated significant differences between the population ofTetranychus urticae Koch and Tetranychus cucurbitacearum (Sayed).on Meram and the two other varieties.