The characteristics of special-needs schools that are attached to elementary, junior high, and high schools, as well as their collaboration and facility sharing, were examined. The results are as follows: 1) Analysis of 1162 special-needs schools clarified the factors that make it possible for specialneeds schools to be " attached " depending on various social conditions. 2) Through case studies, the characteristics of attached special-needs schools, such as curriculum, shared facilities and collaboration by type of attachment, exchange classes, and the gap between the aims and awareness of the actual situation were clarified. *1 豊田工業高等専門学校建築学科 准教授・博士(工学) *2 元 東京電機大学未来科学部建築学科 学士 *3 (株)竹中工務店/東京電機大学非常勤講師・博士(工学) *4 東京電機大学未来科学部建築学科 教授・博士(工学)