Résumé
1) A total of 73 incidents and accidents related to guidance provided to residents obtained from data published by the Japan Council for Quality Health Care were investigated.2) These events can be divided into the following three categories: (1) Events that occurred during direct guidance to a resident by a supervising physician, (2) Events that occurred when a resident performed a procedure by himself or herself without the guidance of a supervising physician, although the supervising physician was near the resident, (3) Events that occurred when a resident performed a procedure by himself or herself while a supervising physician was absent.3) Regarding measures to prevent recurrence, the present results suggests that, in addition to the individual efforts of supervising physicians and residents, there is a need for system development through increased cooperation between the postgraduate clinical training center, each section/department and the department of medical safety management.