Causes that can affect the child's motor development are nutritional status, genetic factors, disease and physical activity. Factors that affect nutritional status include direct causes of malnutrition, lack of nutrition, infection and indirect causes, namely economic factors, inadequate parenting patterns and environmental factors. The purpose of this study was to prove the relationship between nutritional status and gross motor development in preschool children at KB-TK Yaa Bunayya Pacing, Bangsal District, Mojokerto Regency. The research design is correlation analytic, with a cross sectional approach. The population is all preschool age children, totaling 88 children. The research sample was taken using Non Probability Sampling Type Purposive Sampling and that met the inclusion and exclusion requirements as many as 62 children. Based on the Spearman Rho Correlation test, the results show the p value (0.000) < (0.05), so H0 is rejected with the conclusion that there is a relationship between children's nutritional status and gross motor development in preschool age children in KB-TK Yaa Bunayya Pacing, Bangsal District, Mojokerto. The community, especially mothers who have toddlers, if they can regulate the provision of food with appropriate consumption patterns according to the needs of the child, the nutritional status of the child will be better and the child's growth and development will also be optimal. Because the better the nutritional status of children, the better their gross motor development.