Background: Gratification is the emotional satisfaction of happiness in reciprocation to the accomplishment of a goal or desire. The present study was conducted to assess influence of gratification behaviour on early childhood caries and body mass index in children. Materials & Methods: The present study was conducted on80 children age ranged 4- 10 years of both gender. Patients were divided into 2 groups of 40 each. Group I were ECC patients and group I were caries free. In each patient, BMI was calculated using the standard metric system formula for BMI according to CDC (Centers for disease control), i.e., BMI = weight in kg/height in m2. In all patients, gratification response was recorded as delayed and instant. Results: In group I, delayed response was seen in 30 and in group II in 15, instant response was seen in 10 and 25 in group I and II respectively. The difference was significant (P< 0.05). In group I, 6 subjects with delayed response were at risk for overweight and 2 were at risk for obesity. In group II, 4 were at risk for overweight. The difference was significant (P< 0.05). Conclusion: Authors found that Children with ECC were more self-controlled, and children with high BMI were more impulsive.