Abstract
The purpose of this paper is to evaluate the effect of social capital for the environment governance and reveal the accumulation mechanism of it. In analyzing, considering the difficulty of getting data of social capital, a method of structural equation modeling (SEM) is employed. From the results of analysis, it is shown the more social capital is accumulated in the region, the more the environment governance is promoted by stimulating the cooperative action among people. Furthermore, it is revealed social capital stimulates the cooperative action and it is accumulated by the experience of cooperative action at the same time.