Obesity in Indonesia is increasing at an alarming rate. One in three Indonesian adults are obese. The causes of maternal and infant mortality are closely related to the increase in obesity cases in Indonesia. Several studies have stated that BMI early in pregnancy, and weight gain during pregnancy greatly affect the outcomes of mothers and newborns. This type of research is observational with a cross sectional design. The sampling technique is total sampling. Samples were taken by total sampling. The number of samples obtained at the Duren Sawit Health Center was 544 subjects and at the Mampang Health Center as many as 199 subjects. The number of samples is 743 samples. The relationship between BMI of pregnant women and maternal outcomes. The results of the analysis showed a p value of 0.026 which means that there is a relationship between BMI of pregnant women and maternal outcomes. The prevalence ratio is 1.42 (0.43 -0.66) with 95% interval, which means that maternal BMI is a risk factor for labor outcomes. The results of the analysis of the relationship between BMI of pregnant women and neonatal outcomes. Statistical results showed a P value of 0.45 (> 0.05), which means that there is no relationship between BMI of pregnant women and neonatal outcomes. This is supported by the range of prevalence ratio values ??(-1.26 – 0.57) with 95% CI. Conclusion: Maternal body mass index is related to maternal outcomes, namely the type of delivery that will be experienced by the mother.