Introduction: Breast cancer is the most common type of cancer that affects women, and it is the second leading cause of death. Research has shown that every tenth woman gets diagnosed with breast cancer during her lifetime. Although today malignant diseases can be detected at a very early stage, 30 – 40% of women have metastasis to surrounding organs and tissues. Breast cancer can also develop in males, but very rarely. Procedures: For this paper, literature in the form of books and journals were researched. Relevant databases (Hrčak, PubMed, Google Scholar, Ebsco Host) and relevant websites were also consulted. Overview: Breast cancer is a malignant tumor that results from the uncontrolled division of cells in the breast. The easiest way to detect cancer early, when symptoms are not yet present, is mammography. Methods of cancer treatment are surgery, radiation, chemotherapy, and hormone therapy. The method of treatment depends on the patient’s age, the degree of malignancy and the extent of the cancer, and the sensitivity of the tumor to hormones. In the breast cancer care, the nurse has a role in the tertiary prevention of malignant diseases, education of the patients and their family, rehabilitation, and performing nursing interventions focused on the patient’s needs. Conclusion: Breast cancer is the most common malignancy in women. It is considered one of the biggest health problems in the developed countries of the world. Early detection is the most important in this disease, and nurses play the biggest role. Their task is to transfer their knowledge about the risk factors, symptoms, and signs of cancer and to educate women on the importance of regular self-examination and undergoing a mammogram examination at an earlier age if there are indications.