Thirteen grain varieties belonging to five grain types were evaluated to infestation with the rice weevil, Sitophilus oryzae (L.) under no-choice rearing at constant conditions of 30 ± 1˚ C. and 70 ± 5 % R.H. The tested varieties were Single cross, T.W.C.352, T.W.C.327, T.W.C.325 (maize) ; Giza 15, Dorado (sorghum) ; Giza 168, Sakha 93, Gemeza 7 (wheat); Giza 177, Saka 101 (milled and husked rice) and Sakha 104 (milled rice) and Giza 2000 (barley). To clarify the differences between grain varieties and types as regard resistance, least and mean complete developmental period, number of F1 emerged adults and their sex ratio were determined. Moreover, susceptibility index, % infested grains, number of holes per infested grain and % weight loss were assessed as infestation parameters.