Breastfeeding can decrease risk of infant death. But, it is not clear yet the effect of breastfeeding duration to the infant survival after controlled for the other determinant factors. This research is aimed to know the effect of duration of breastfeeding to infant survival in Indonesia after controlled for mother, infant, and environment factors. Data was analyzed by using multiple cox regression models. The result showed that duration of breastfeeding had a significant effect to infant survival in Indonesia. Infant who breastfeed for 6 months or more had 33.3 better survival than those who breastfeed less than 4 months. Infant who breastfeed for 4-5 months had 2.6 time better survival than those who breastfeed less than 4 months. Others determinant of infant survival in Indonesia are the number of under five year children in family and their residence. Its recommended to all party were expected to support the policy conducted by Department of Health to improve the duration of breastfeeding up to 24 months.