The practice of transformational leadership behavior (TLB) and organizational effectiveness has been a large amount of study in recent years. Research has found that transformational leadership is one of the most significant contributors to organizational performance and outcomes. However, there is only a little research done on the link between TLB and church ministry effectiveness (CME) in Adventist Church setting. This paper explored the influence of TLB to CME. A total of 525 church members participated in this study from five local missions and conferences in East Indonesia Union Conference (EIUC) of Seventh-day Adventist (SDA). The findings showed that: (1) using Pearson’s correlation, all dimensions of TLB (idealized influence, intellectual stimulation, individual consideration, and inspirational motivation) and CME (worship service, evangelism, fellowship, group Bible study, and fellowship) have a positive and significant relationship, and (2) using multiple regression analysis, all dimensions of TLB help predict the variance in CME.
Keywords: church leadership, transformational leadership, church ministry, church organization effectiveness