Breast cancer has become the second most common malignancy in the world type, for this reason the WHO is promoting the fight against cancer through the use of mammography and breast self-examination especially in vulnerable populations. The objective of the study was to determine the knowledge, attitudes and practices on breast self-examination in women in the rural area of Cartagena. He was a descriptive study with a sample of 779 women older than 20 years, residents in rural areas, selected by sampling by clusters, taking as a reference the 15 townships belonging to the district and subsequently doing proportional affixation. A survey which included Sociodemographic variables, knowledge, attitudes and practices on breast self-examination was applied. In the assessment of the level of information, insights and application of breast self-examination found that 73% of women know the self-diagnosis is performed, 77.8% are fully in agreement with that is good to do so, 49% have never done it and only three women have a good practice. It was concluded that in the rural area while the women have received information about the technique of self-diagnosis, these do not perform it is properly.