相互依附之群體關係盛行於當今組織中,群體成員間的情感狀態與其互動已成為組織研究的焦點。本研究以多層次觀點,探討群體凝聚力在任務互賴與目標互賴對員工的組織公民行為之中介影響。研究資料來自53間公司研發部門的53位主管與270位員工。研究結果發現任務互賴與目標互賴會完全透過群體凝聚力之中介,進而影響員工的組織公民行為,本研究亦證實任務互賴比目標互賴對群體凝聚力有較大的影響力。 Interdependence among group members prevails in contemporary organizations. Group member’s affective state and interaction has become an important issue that interests organizational behavior scholars. This study investigated the mechanism of group cohesion in the relationship between both task interdependence and goal interdependence and individuals’ organizational citizenship behavior (OCB). A multilevel perspective was adopted to?investigate the complex relationships among variables. Data were collected from 53 supervisors and 270 employees from the R&D departments in Taiwan. It is found that group cohesion fully mediated the effects of task interdependence and goal interdependence on employees’ OCB. In addition, task interdependence had a greater effect on group cohesion than did goal interdependence. Implications and suggestions for future research are discussed.