This article is the result of research funded by the Ministry of Research, Technology and Higher Education of Republic Indonesia. This research was conducted because of existing a lot of facebookers in Indonesia and raising many groups affiliated to ethnicities which used facebook. This research was qualitative approach. First stage in this research is to identify members status within groups in related to spreading of nationalism. Data of postings in facebook were analyzed. To sharpen analysis, researcher also interviewed chair person of group and member of group. The theory that was used in this research was imagined community from Benedict Anderson’s thought. The result showed that the fifth group used facebook group to inter-connecting for communication and spreading of Indonesia nationalism values.