越來越多的社會學家、政治學家、經濟學家和組織理論家援引社會資本的概念,在尋求擴大在各自領域面臨的各種問題的答案。本研究欲探討社會資本對區域創新系統產學研合作績效之影響;兼論合約在其中之調節效果,意即合約之調節之下,是否強化社會資本對區域創新系統產學研合作績效之影響。面對知識經濟蓬勃發展的臺灣,中臺灣(中彰投)位於臺灣地理中心樞紐位置,此三大區域的經濟活動領域範圍相當多種,形成區域性的產業聚落。故本研究以中臺灣之中小企業為主要研究對象,並採問卷方式進行調查。本研究結果顯示:(1)社會資本與區域創新系統之產學研合作績效為正向關聯,(2)透過合約之約束,可以使區域中成員的信心增加,提升企業與合作夥伴間的信任程度,增進社會資本中影響區域創新系統中之產學研合作績效。(3)合約能強化社會資本之關係性對區域創新系統之產學研合作績效的提升,可促使成員之間的資源流動、知識移轉與組織學習更有效率,強化區域的整體競爭力。 Social capital theory is frequently cited by more and more studies in many social science fields. The primary objectives of this study are to explore the effect of social capital on the cooperative performance of regional innovation systems, and to explore an important moderating effects of the contract, which can reinforce trust level between partners. This study focused on the SMEs in the central Taiwan, which covers a wide range of economic activities and comprises several industrial clusters, and surveyed by questionnaire. Using regression analysis, the empirical results indicated that: (1) there is a positive relationship between social capital and the cooperative performance of regional innovation systems; (2) the contracts facilitate corporate and trust among partners, then enhance the relationship between social capital and the performance. This research contributes to regional innovation field by disentangling the moderating roles of contracts, which is also a good help to facilitate the flow of resources, knowledge transfer and organizational learning between members, thereby strengthen the competitiveness of the region.