The purpose of this study is to extract general needs and to develop an assessment scale of individual needs in critical care patients'family. A 67-item self questionnaire was handed to 127 family members who consented to our research, and 112 responses were analyzed. We examined the responses and deviled them into two groups; that is General Needs and Individual Needs. There were 15 items which all respondents regarded as “(fairly) necessary/important”. An exploratory factor analysis and a confirmatory factor analysis of the Individual Needs revealed 15 items in three subgroups. The subgroups are, 1) Support from staff, 2) Timely information, and 3) Flexibility of visiting. The author made a new assessment scale of individual needs according to this analysis and examined it's reliability and validity. The new scale has acceptable properties and would be a useful tool to measure individual differences of needs.