BACKGROUND: Toddler nutritional status is an indicator of toddler growth. Basic Health Research, 2010 states: 5.4% malnutrition status and 13.0% malnutrition. In 2013, the proportion of malnutrition status was 5.7% and malnutrition was 13.9%, from the target of 19.6%, and in 2018, the proportion of malnutrition was 3.9% and malnutrition was 13.8% of the target of 17.7%. AIM: The research objective to determine the effect of maternal knowledge and attitudes on the nutritional status of children

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... nder five. METHODS: This study was cross-sectional study design. Population 135 and a sample of 94 people. Sampling technique: Simple random sampling. Independent variable: Knowledge and attitudes of the mother, while the dependent variable: Nutritional status of children. Data collection techniques: Questionnaires and baby scales. To analyze the effect of the independent variable on the dependent variable, multiple logistic regression with a significance of 0.05 was used. RESULTS: Knowledge of mother Group b affected 3.2% with poor nutritional status and 34% affected good nutritional status. Mother's attitude affects 1.1% of children under five with poor nutritional status and affects 16% of children with good nutritional status. From the results of the analysis using multiple logistic regression, it was found that the effect of the knowledge variable on nutritional status was 0.000 (<0.05), while the effect of attitude on nutritional status was 0.000 (<0.05). CONCLUSION: There is an influence of knowledge and attitudes of mothers of children under five on the nutritional status of children under five. SUGGESTION: To reduce the incidence of malnutrition and malnutrition in Indonesia is to increase the knowledge and attitudes of mothers under five in providing menus according to the needs and age of the child.