Abstract: This study examines the Inter-Religious Harmony Forum (FKUB/Forum Kerukunan Umat Beragama) of Central Java and its role in realizing and maintaining the religious harmony. This research conducted qualitatively. The researcher collected the data by using interviews and participative observation techniques upon the management line of FKUB. The analysis of data was based on qualitative descriptive technique. This research concludes that the role played by FKUB exceeding its duties and responsibilities as stipulated in the Joint Ministerial Decree (Peraturan Bersama Menteri/PBM) between Minister of Religious Affairs and the Minister of Home Affairs No. 8 and No. 9 Year 2006. FKUB have also played a role as a promoter and educator of the importance of religious harmony and acted as reconciler-mediator in resolving religious conflicts. In addition, this research noticed that FKUB activists often dealt with a pressure from many entities in performing their duties so that their position needs to be strengthened and empowered to be more optimal. Some of FKUB activists were also found to be labeled as people who are ‘unfinished with themselves yet’ which is characterized by excessive fanatic’s attitude, intolerance and immature acts in performing their religion to the level that it can disrupt their relationships with the people from other religions.