Social interaction caused by sharing the personal health information has a positive influence on health behavior change. Disclosing private information, however, can arise privacy issues, and privacy issues can reduce the user’s willingness to share. This research proposed ‘User Autonomous Sharing Regulation’ that respects user privacy in health-related personal informatics system. This is not to follow rules provided a system, but to identify the user own sharing needs and privacy concerns then regulate a sharing accordingly. In order to explore the autonomous sharing regulation and to develop design knowledge for it, three user-centered studies were conducted : user interviews, user diary studies, and interviews with generative design session. Based on findings of the studies, a design framework was proposed for autonomous sharing that respects user privacy in health-related personal informatics system.