As businesses continue to forge ahead in the twenty-first century, knowledge management (KM) has materialized as a significant differentiator. The process of creating new knowledge, sharing, and preserving such knowledge, is crucial for achieving competitive advantage. To gain maximum benefit from new knowledge, it must be efficiently integrated into the organization within a continuous knowledge life cycle. In this respect, mentoring is becoming ever more effective as a means to facilitate knowledge creation and sharing and build intellectual capital. This study aims to examine how both formal and informal mentoring enhances KM in the Lebanese banking sector.