Purpose: This report intends: 1) to clarify degrees of the post-school adjustment of the men-tally retarded in work in relation to the employers'attitudes toward them, and2) 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 selected18cases 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. Results: 1) Degrees of inner adjustment of the18cases are classified into three levels (high→ low) on the one hand, and on the other hand four characteristic types of employers'attitudes toward these cases are pointed out.Cross-tabulating these two factors, we have found that those cases who show highly satisfactory post-school adjustment are working under employers with active and warm hospitality, and with employee-centered orientation rather than management-centered orientation. 2) We have followed up the teachers'teaching patte rns which might influenc ethe inner adjustment of these subjects, and have been ableto confirm that their teaching patterns are main factors to decide the degrees of post-school adjustment. As long as the final goal of our series of study is directed to establishing ideal patterns of teaching in the special classes for the mentally retarded, we believe these ideal patterns will be highly important in view of a desirable growth and self-support of the mentally retarded.