This is a semiexperimental research to study effect of education on knowledge of mothers with children under six years of age about preventing their child from being poisoned and providing first aid in case of such an inctdent in Tehran.

100 mothers between 18-38 years old were surveyed, The range of their education was from elementary to high school diploma.

The tool for collection of data was a questionnaire which included demographic and 16 questions about prevention and 7 questions about providing first aids. After completion of questionnairs an educational booklet about prevention and first aid was also provided. For the purpose of this study two days later the same questionnaire was given and collected again. The result of both questionnaires was evaluated and factors such as age, job, number of children, level of education, resourses for obtaining health information were also studied.

Statistical analysis and application of test (r)l, Z and K2 (x2) and tchouproff coefticient showed that factors such as age, job, number of children, and educational certificates had effects on mother's knowledge level in prevention of childhood poisoning and providing first aid, but the resource for obtaining information had no effect on their knowledge level. Statistical analysis by reviewing every question showed that knowledge of mothers in the field of provided eduction has been increased.