Introduction: Obesity in childhood is not only isolated to obesity in adulthood but it also ‎aggravates physical complication later in life. One of the simple strategies for prevention of ‎pediatric obesity is breastfeeding in infancy period.‎

 Objective: This study aimed to determine the relationship between milk feeding pattern and ‎preschool children’s weight.‎

 Methods: This study is a retrospective case-control. For data collection, a questionnaire, meter ‎and scale was used. In this study the case groups were obese children and the control groups ‎were children with normal weight. Sample size was ‎‏120‏‎ that were selected by cluster ‎randomized method. Researcher selected the sample by reporting to day care centers affiliated ‎to Behzisti and ‎‏60‏‎ obese and ‎‏60‏‎ normal weight children were chosen after their age, sex, ‎height, weight and BMI was measured. According to the definition of this study, children ‎with BMI more the ‎‏85‏‎ percentile based on age and sex were considered obese.‎

Results: The results indicated that there was a significant difference between milkfeeding ‎pattern during infancy and obese, and normal weight children (P<‎‏0.001‏‎). But there was no ‎significant difference between timing of introduction of solid foods. But there was a ‎significant difference between daily TV watching (P<‎‏0.001‏‎), mother’s BMI (P<‎‏0.001‏‎) and ‎birth weight (P<‎‏0.003‏‎) in two groups.‎

Conclusion: This survey indicated that milkfeeding pattern differed significantly between ‎obese and normal weight children, also after adjusting demographic characteristics, ‎milkfeeding pattern was significant, thus milkfeeding pattern along with demographic ‎characteristics effects children’s weight.‎