知識分享是知識管理中最重要的議題。本研究主要參考IPO團隊運作模式，探討知識分享在影響資訊系統開發團隊效能中所可能扮演的中介效果。經蒐集35個資訊系統開發團隊資料，以層級迴歸方法進行分析。結果發現，不管是成員之自我效能、團隊互動、以及團隊信任之成員信任，對於知識分享均有顯著的正向影響。進一步更發現，知識分享在自我效能與團隊效能、團隊互動與團隊效能、以及團隊信任與團隊效能的關係上扮演中介的角色。可見，團隊運作過程，除增加成員在專業領域之自信心、加強團隊成員間之良好互動、提昇團隊成員之信任感外，更重要地，應該鼓勵成員彼此分享知識，以進一步提昇團隊之效能。

Knowledge sharing is the most important issue in the knowledge management. In this study, we mainly refer the IPO model to explore the mediating effect of knowledge sharing among these factors that influencing information system development (ISD) team effectiveness. Using hierarchial regression analysis, this study analyzes data from 35 ISD teams. The results indicate that self-efficacy, team interaction, and team member trust of team trust, all have significant effects on knowledge sharing. Furthermore, it appears that knowledge sharing plays mediating roles among self-efficacy-team effectiveness, team interaction-team effectiveness, and team trust-team effectiveness. Therefore, we suggest that managers should encourage team members to share knowledge each other.