Low birthweight (LBW) is one of main causes of infant mortality in the world. World Health Organization in 2003 had recommended breastfeeding for LBW handling. However, LBW mothers face many difficulties during early postpartum period. Moreover, breastfeeding in Indonesia is also influenced by social and cultural belief, so it may influence mothers' decision whether remain breastfeeding or not in early postpartum period. This study aimed to explore the meaning of the experience of mothers to remain breastfeeding their LBW infants. This qualitative study was conducted using phenomenological approach. Seven participants were mothers ever breastfeeding their LBW infants. Data were collected through semi-structured in-depth interview, observation and secondary data on May – June 2015. Data analysis used Colaizzi method (1978). There were four themes found namely introduction of breastfeeding since early for LBW infants, granting of early complementary feeding as an alternative to overcome breastfeeding problem, cultural belief and social environment influencing support for breastfeeding mothers as well as accepting breastfeeding as the very nature of woman. Breastfeeding LBW infants has higher difficulty le-vel, also any tradition family believe and social environment really affect support given to mothers in breastfeeding.