This paper was written with the intent to represent to the reader breast cancer with its causes factor, breast cancer types, localization of breast cancer, methods of early detection of breast cancer per National Programme of Early Detection, and treatment of cancer with contemporary methods in regional medical institutions. National Programme of Early Detection of Breast Cancer in Brod- Posavina County, conducted in the period of 2006 – 2014, displays the results of research of breast cancer diseased in Nova Gradiška and Slavonski Brod region. The research was conducted on all women ages 50 – 69 through free mammographic screening provided to detect, as early as possible, potential development of this malignant disease which is the leading cause of death of women ages 35 – 69 worldwide. World Health Organization presumes every eleventh woman in the world is in threat of breast cancer, therefore this type of prevention, early detection and treatment is extremely important for decrease of number of breast cancer diseased women. A particularly strong emphasis is placed on early detection of the disease because in this case the treatment is more favourable. By refering to roles of nurses and family physicians in this paper, an emphasis is placed on the importance of family physicians and nurses in implementation of the public health measurements. These imply accessability and sending patients to examinations. They also imply boosting levels of awareness about the possible consequences of not going to mammographic screening, especially if the person in question belongs to a risk group described thoroughly hereinafter. Owing to information systems and sufficiently educated staff which maintains above mentioned measurements, the aim of all programmes and us individually is decrease in the number of breast cancer diseased women and detection of aforesaid in the earliest possible stage.