Abstract: Malnutrition, a global health problem, is a state of lacking proper nutrition. It contributes to childhood morbidity, mortality, impaired intellectual development, and increased risk of diseases in adulthood, with lack of knowledge and proper feeding practice being the leading cause. Therefore, the study aims to assess the knowledge, attitude and practice towards malnutrition among the mothers with under five children of Inaruwa, Sunsari, Nepal.