Abstract
IT-izing of the healthcare field is indispensable to development of the healthcare treatment of future our country. Especially, in carrying out the "inter-regional association type electronic health records development project" which is the social information system of the healthcare field expected, the project management which did not aim at the suboptimization for every stakeholder, but aimed at the optimization between whole stakeholders, such as a patient, a healthprovider, and a governmental agency, will be required from now on. It boils and the development project of a medical network is considered about development of the social information system of the healthcare field for an example.