Background:Nowadays, more mothers are choosing to work so they must divide their time between responsibilities. More time spent working will be reduce time for household chores, care and play with the children. Reduced time for household and child can affect food choices in children that can lead to obesity in children. Objective: to identify maternal employment as risk factor of obesity in preschool children and corelation between working hours and nutrition intake. Method:A case control study on preschool children aged 3-5 years, 101 cases have nutritional status weight-fot height: Obese (z-score> 2 SD), matching for age and sex with 101 controls that have nutritional status weight-fot height: normal (-2 0 , 05) as risk factors of obesity in preschool children aged 3-5 years. Working hours was not statistically correlated (p> 0.05) with energy (r = -0.04), carbohydrate (r = -0.10), protein (r = -0.00), and fat (r = 0.02). Conclusion:Maternal employment and working hourswere not statistically significant as risk factors, but tend to increase likelihood of obesity in preschool children and there is no correlation between working hours and nutrition intake (energy, carbohydrates, protein, and fat) Key words: childhood obesity, maternal employment, preschool children, nutrition intake, working hours