Breast milk is the best nutritional intake intended for babies 0-6 months because it contains a variety of nutrients that are needed by the baby for optimal growth and intelligence. The purpose of this study is to look at differences in the Level of Knowledge and Family Support before and after counseling on Exclusive Breast Milk. The study used analytical observational methods with Mc-Nemar statistical tests on two paired groups. Based on the results of the mc-nemar statistical test family support obtained a value of p value 0.001 < 0.05 and knowledge level 0.002 <0.05 which means there is a significant difference between family support before and after counseling and a significant difference between the level of knowledge before and after counseling regarding exclusive breast milk. It is necessary to intervene in the knowledge of family support and related agencies to continue to increase maternal knowledge and family support for Ekslusive breastfeeding.