Aim of this study was to investigate the relation between servant leadership and task performance with the mediating effect of core job characteristics and moderating role of perceived organizational support. Though the sound effects of servant leadership on task performance are well-documented, the mechanisms that clarify those effects are not clear. This study suggests that servant leadership is linked to the way employees’ view about their jobs and the core job characteristics. Outcomes of the study favor a structural model whereby indirect influence increases the direct influence of servant leadership on task performance through the mechanisms of core job characteristics. The result showed that perceived organizational support (POS) is a significant relationship between servant leadership and core job characteristics. The data has been gathered from 300 workers from both Islamic and traditional banks. It has been concluded that servant leadership has significant linked to task performance with the mediating impact of core job characteristics.