B ased on the results of basic health research, it is shown that the prevalence of malnutrition in children is still quite high in some areas of Indonesia. Many contributing factors influence children's nutritional status, one of which is maternal nutritional status. Upper arm circumference measurement is one way that can be used to determine maternal nutritional status. Due to this reason, a study was conducted to find a connection between arm circumference of the mother and the nutritional status of the child. This study used an observational analytic study with a cross-sectional design which included 79 respondents at the Posyandu Dahlia Sukabumi. Research data collected include the form of mother's age, mother's education, childbirth history, exclusive breastfeeding history, child's age and sex of the child were obtained using a questionnaire. Evaluated the nutritional status of children by measuring weight using scales, height using a stadiometer, and arm circumference over the mother using LLA tape. Data analysis then conducted by using Fisher statistical test. Out of the 79 respondents studied, 86,1% of mothers had good nutritional status and 13,9% of mothers had poor nutritional status. 6.3% of children had poor nutritional status and 93.7% had normal nutritional status. The Fisher test results did not find a significant relationship between arm circumference size of mothers with nutritional status of children aged 6-24 months with a value of p = 0.537 as well as other independent variables. There is no relationship between the size of the arm circumference of the mother and the nutritional status of children 6-24 months indicating the presence of other factors that directly contribute to the nutritional status of the child.