It was found that the retarded children we had trained were divided into two groups. The first group (C-Group) members were the children whose emotional condition were stable all the time, whose vitality was substantial and who had a bright and happy life, while the second group (U-Group) members ivere the childten whose personality growth was disturbed by their enervation, inferiority complex and anxiety. The purpose of the present paper was to certify the factors involved in different personality formation in the mentally retarded children. The sub.jects we selected were forty educable retarded children and were divided into C-Group and U-Group 'through their teachers' observations in the educational situations. Each child's mother was asked to indicate her expectancy on her child's future and her "way to live" or her "view on life" The teachers were asked their views on "retarded development of mentality" in children and their educational viewpoints on retarded children. And the pro,cess of the human relationship between each child belonging to two Groups and his teachers was analyzed through the "Educational Relationship Scale" presented in Table 1.