The present study was conducted to study the correlation of Body Mass Index with arterial blood pressure in school going children. A cross sectional type of study was carried out among 400 male students between the age group of 8-10 years, selected from Islahul Amal primary school Nanded . Children were grouped as Group I: 8-9 yrs and Group II: 9-10 yrs with 200 students in each group. Height and weight was recorded & Body Mass Index (BMI) was calculated. Blood pressure was recorded as recommended by the fourth report on diagnosis, evaluation and treatment of high blood pressure in children. The statistical analysis was done using Pearson’s correlation test. There was significant positive correlation of systolic & diastolic blood pressure with Body Mass Index in both groups. We can conclude that BMI is possible important contributory factor associated with increased risk of developing elevated BP among school going children.