摘要:AbstractBreast cancer is the most common malignancy in women worldwide. The lack of adequate skills and knowledge make the women incapable of early detection of breast cancer; as a result, they neglect it. This study determined to study the effect of BSE educations on women's knowledge and performance. This is an experimental research in which 200 women were randomly selected and put into case (n=100) and control (n=100) groups. At first, demographic information, knowledge and performance collected by observation and interview. Then, experimental group received two training sessions. The results showed that before the intervention no statistically significant difference was found between the two groups (Knowledge: p= 0.08, performance: p= 0.7). One month after training course the experimental group members showed a significant difference from the other group. (Knowledge: p<0.001 performance: p<0.001). it seems that BSE is effective in women.