This research discusses about environmental movement initiated by the people of Kampung Gambiran and Kampung Gondolayu Lor, Yogyakarta City. The main argument of this study is that different outcomes by the two environmental movements were affected by the difference in social capital. This is qualitative study. The result of the study shows that the influence of social capital in determining the outcome of environmental movement. Environmental degradation in Kampung Gambiran motivated the local inhabitants to do internal integration and building network outside community. Kampung Gambiran has several achievements, facilities, and activities supported by community fund and outside donors. The movement was also spread by Forsidas Gajah Wong and Merti Kampung. In Kampung Gondolayu Lor, environmental movement was caused by garbage problems and the instruction by the government. The environmental activity without social integration in Kampung Gondolayu Lor resulted in inability to mobilize internal resources and building external network. Key Word: Environmental Movement and Social Capital
