The coverage of exclusive breastfeeding in Indonesia in 2018 was 37,3% based on Basic Health Research, it was less than half of the target from Ministry of Health. Mothers who back to work might affect the failure of exclusive breastfeeding. Despite the regulation had been applied, not every workplace provides lactation room. The purpose of this study was to analyse the necessity of having lactation room for workers at UPN “Veteran” Jakarta. This was a qualitative study, 13 working mothers, 8 male co workers and 4 managers were involved as informants. Data were obtained by in-depth interview questionnaire and analysed by thematic method. The result of this study showed that most of breastfeeding mothers thought that it was uncomfortable to pump their breastmilk without lactation room, they try to continue breastfeeding their child by pumping at the workplace because it was quite important to their child. There should be a proper lactation room, at least one per faculty so they could pump the breastmilk safely, privately and equipped with fridge, water sink and sofa to make them comfortable and keep the quality of breastmilk. All of the co-workers  and managers understood that working mothers need to pump their breastmilk every 2-3 hours for about 30 – 40 minutes. They agreed that there was a necessity to have proper lactation room to support breastfeeding mothers at workplace.