A Case Control study on factors contributing to obesity / overweight among school children at selected schools of Gandhinagar, Gujarat state”. Case control study design was used for the study. The setting for the study was selected school at Gandhinagar. The sample for the present study includes 60 school children. The sample size was arbitrarily decided to 30 cases and 30 controls. purposive sampling technique was used to select cases and controls for study. the cases and controls were allotted based on BMI. The tool consisted of two sections. Background data of school children and Selected contributing factors of obesity. The data collected were edited, tabulated, analysed and interpreted by SPSS version. The findings revealed The findings revealed that 28(93.33%) of school children in the cases and 4(13.33%) in the controls had high risk of contributing to obesity and there was significant association with the cases at the level of p=0.05. The risk for developing obesity in cases is 7.15 times that of the controls.