Breast cancer is the leading cancer affecting women, with 2.3 million diagnoses and 670,000 deaths globally in 2022. In Indonesia, there were 66,271 cases, representing 30.1% of all cancer cases. Early detection, such as through Breast Self-Examination (BSE) to identify breast lumps, can reduce mortality. BSE is effective for Women of Childbearing Age (15-49 years). However, early breast cancer detection rates remain suboptimal, potentially influenced by the knowledge and behavior of women of childbearing age regarding BSE. Objective: To determine the overview of the level of knowledge and behavior of Breast Self-Examination (BSE) among Women of Childbearing Age in the Pajang Public Health Center area. Methods: This study employed a quantitative descriptive method using purposive sampling. The population consisted of 7,538 Women of Childbearing Age, and the sample comprised 99 respondents. Results: The majority of Women of Childbearing Age in the Pajang Public Health Center area demonstrated a good level of knowledge about BSE, with 52 respondents (52.5%). Furthermore, most respondents exhibited good BSE behavior, with 65 respondents (65.7%). Conclusion:  The majority of respondents had good SADARI knowledge and good  Breast Self-Examination (BSE)  behavior.