Despite the fact that more elderly residents tend to live in medical facilities rather than in welfare institution, few researches have focused on the settings in medical facilities for the elderly. This paper focuses on a hospital for the elderly which has been rebuilt and, from the viewpoint of the residents' mode of stay, aims to clarify the form of utilization of the shared spaces in the facility. The results are as follows: 1) In order to control the influences by the surrounding people, the residents appropriately use various shared spaces depending on whom they spend time with. The residents with not sever ADL levels tend to make interactions in the newly added common spaces except the two living spaces. 2) In the living spaces, interactions among the residents and also between the residents and the carers decreases because utilization of the living spaces by the residents with not sever ADL levels and the carers is not seen frequently. But, on the other hand, the physical settings such as a kitchenette are effective and expected to make interactions among the residents.