Positive deviance describes children who grow and develop well in underprivileged families and communities, where there are many malnourished children. They are children with positive deviance raised by families with positive deviance. Malnutrition at the beginning of life will affect the growth and development of children and the quality of life thereafter. The high child mortality rate indicates serious health and nutrition problems. Malnutrition is caused by low consumption of energy and protein from daily food and occurs for a long time. Undernutrition limits based on standards are less than -2SD to -3SD. The purpose of this study was to identify positive deviance in feeding (type of food, food processing, mealtime and feeding method) among two children who experienced good nutrition in poor fishing families in the region of Belawan Health Center Work in 2021. This study is a qualitative research with a narrative approach. The informants in this study were 5 key informants, namely mothers who had good nutrition children, aged 6-24 months from poor fishing families, as well as supporting informants as many as 5 husbands 2 people from health cadres and midwife coordinators. The results of the study found that there was a positive behavior in feeding among under two children with good nutrition by utilizing marine products that had a high nutritional value and snakehead fish capsules as vitamins supplementation. How to feed actively and a pleasant eating atmosphere by coaxing and seducing children by carrying or singing. It is recommended that parents be more intensive and proactive in paying attention to each child's growth and development in order to prevent undernutrition. Positive deviance in feeding that relates with good nutrition can be promoted as examples for other children in other regions.