Democratization has brought meaningful changes to the labor movements. One of the notable changes occurred at the plant-level after democratization. Workers` resistance or "unjuk rasa"(shop-floor demonstrations)under the Suharto regime had been largely occurred as "resistance without organization", which could not lead to the establishment of representative unions at plants. In the post-Suharto era, by contrast, "resistance with organization" has developed. This study examines how democratization changes labor movements from the bottom, through the case of Maspion worker strikes. Maspion Unit I is located in Siloarto, the industrial area beside Surabaya. I conducted in-depth interviews with Maspion strike leaders and utilized a methodology of participatory observation of the union activities, during fieldwork conducted from January to May 2001. Acoording to the fieldwork data, this study argue the emergence of working-class leadership from the plant level unions. The emergence of a working-class leadership with a mass-base and financial autonomy, has influenced management by decreasing the shop-floor despotism, and revealed that the elite-oriented labor movement is in a process of change towards a "labor movement by the working class" in post-Suharto Indonesia.