Background & Objective: Breast cancer is the most common cancer occurring among women and the second leading cause of death from cancer among them. The mortality rate of breast cancer is directly related to the stage of the disease when diagnosed, and is reduced by regular breast cancer screening program. This survey is carried out to identify the knowledge, attitude and practice of women in Ardabil about BSE.

 Methods: In this descriptive study, 150 women with 20-25 years of age, were selected through systematic cluster sampling. Knowledge, attitude and practice of them about BSE were investigated through face to face interview, and the obtained data were analyzed using descriptive and analytic statistics.

 Results: 44% of women had some information about breast cancer. 44.7% of them had average information about BSE. There was statistically significant relationship between knowledge of BSE on the one hand and age, marital status and history of previous breast examination on the other. 52% of them believed in BSE for early detection of breast cancer. Their attitude towards BSE was positive (51.3%) and there was a significant relationship between their knowledge and attitude. 18% of the subjects practiced BSE at least once, and their overall practice was in a weak level (46.7%).

 Conclusions: Qualitative researches could be recommended to recognize the factors effective in the improvement of acceptance of breast cancer screening methods among women.