Malnutrition is the main cause of child mortality in developing nations, especially in Sub-Saharan Africa and South Asian countries. This undernutrition status is predominantly higher among primitive tribal (ST) children under 5 years of age. The nutritional status of tribal children is a serious concern in India. For this, there should be intends to examine the prevalence and determinants of primitive tribal children's nutritional status. To investigate the effect of household, child’s & maternal characteristics on biological children under 5 years of age. The study aims to find out the association between some selected determinants on scheduled tribe child’s nutritional status. The study used some selected variable of scheduled tribe mothers, household characteristics and their children anthropometric indices from DHS datasets of India, which was published by the NFHS datasets of India. In this study People datasets and Children (Under 5 years of age) of interviewed women file datasets of NFHS-IV & V is taken. The datasets of West Bengal, ST mothers, and their child into consideration as per the research interest. Then to analyze the determinants of ST children (U5 age) nutritional status, some determinant factors are taken from mothers, children and household characteristics. Children’s stunting, wasting and underweight as dependent variable and the mothers, child’s and household’s characteristics as independent variable. The statistical analysis was done by using Pearson Chi square test used to analyze the association between dependent and independent variables. The study results shows that the mother’s educational status, child’s age, birth order, size of child at birth, type of residence had significant associations with stunting. Mother's anemia status and mother age had significant associations with wasting. Mother education, currently breastfeeding, child age, sex of the child, birth order, size of child at birth, type of residence, wealth, toilet facility, and cooking fuel shows a significant association with underweight. The results found that many determinant factors had a significant role among ST children's (U5 age) nutritional status. Thus, the findings will help to achieve tentative resource allocation, and utilization through various programs and policies to improve the ST children (U5 age) nutritional status. There is a need to take a multisectoral and multidimensional approach to develop for those primitive tribal children.