Abstract
This study clarified the type of social network structure that influenced trust between community-related organizations. Our analysis identified that the specific index of the social network structure acted with the level of trust between organizations. This implies that, to build trust between inner and outer organizations of neighborhood associations effectively, we need to pay attention to the following three points: 1)reduce outdegree of a specific group, 2)increase closeness centrality and 3) mitigate constraints of the social network structure.