In the present study, an attempt has been made to find out that whether the adjustment capacity of school going girls in different socio-economic status influenced by their health related physical fitness or not. Total95girls were selected for the study. Two higher secondary schools of South 24 Paraganas district in West Bengal were selected for the study. In this study the present researchers considered adjustment level as dependent variable and Health Related Physical Fitness as independent variable. The data was collected by use adjustment level questionnaires by Sinha and Singh and Socio economic were measured through the kuppuswamy questionnaire of latest version. Health related physical fitness components were BMI was measured by Weight (kg.)/Height2 (mtr.), Upper Body Strength Endurance measured by maximum duration of flex arm hang, Abdominal Strength Endurance measured by no. of curl ups in one minute, Flexibility (FLX) measured by v-sit and reach test and Cardio Respiratory Endurance (CRE) measured by 1500 meter run/walk test. The data were analyzed with the help of statistical procedures. Mean, standard deviation (S.D), and correlation coefficient were employed. Adjustment level of lower middle class has a very weak negative correlation with Cardio Respiratory Endurance (r = -0.055), significantly negative correlation found with flexibility (r =-0.776). But in case of other health related fitness variables i.e. Upper Body Strength Endurance (r = 0.209), Abdominal Strength Endurance(r = 0.325), Body Mass Index(r = 0.023) positive but not significant correlations were found respectively. The Adjustment level of upper lower class with Cardio Respiratory Endurance (r = -0.046), Flexibility (r = -0.165), Upper Body Strength Endurance (r = -0.165) and Abdominal Strength Endurance (r = -0.038)of girls students negative correlation were found respectively. But in case of BMI it has significant positive relation (r = 0.318) was found. In this study we concluded that adjustment level significantly influenced by flexibility and BMI.