Field studies had been carried out to estimate the damage caused by rodents on wheat, tomatoes (winter crops) and rice, maize (summer crops) in Mansoura and Aga districts, Dakahlia governorate during 2005  season.             The obtained results could be summarized as follows: Wheat crop was attacked heavily by field rodents during the milky and dough stages, with total damage percentage of 2.62 % and 2.15 %, while reached to 2.89 % and 2.44 % on tomato crop. in Aga and El-Mansoura districts resp.             The total damage percentage on summer crops were (1.84 & 1.67 ) for maize crop, while percentages were (1.47 & 1.77) for rice crop in Aga and El-Mansoura districts.