Purpose : This report intends : 1) to clarify degrees of the post-school adjustment of the mentally retarded in work in relation to the employers' attitudes toward them, and 2) to evaluate two teachers' teaching patterns in the special classes for the mentally retarded as an important factor to produce satisfactory post-school adjustment and furthermore to appraise the entire problem so that a fundamental evaluation of the special education system may be brought about. Subjects and Procedure : For this study we have selected 18 cases who graduated in two classes for the mentally retarded and are at present in work in an emotionally stable condition. Following these cases we have done an intensive case study mainly by the interviewing technique. The employers, teachers, parents and, when possible, subjects themselves were interviewed.