Abstract
The civil engineers have served to support local society through the supply of the infrastructure conventionally. In late years, the engineer has been strongly needed to accord with the opinions from a citizen/local needs when he makes the plan or operates the management of the infrastructure. Therefore, in this report, we took up the success example of the community improvement and, we paid my attention to the role of an engineer engaged in community improvement and the process to solve the problems. As a result, regardless of prior local social capital, we observed that there are the possibilities that the social capital such asthe trust, norm or network have increased and supplemented mutually and the problems have been solved if the engineers have the chance to hear the local opinionand facilitated to make the rule or norm to use or manage the infrastructure with inhabitants and the administration together.
