So far as the guideline is concerned, there are close resemblances of the teacher`s role emphasised in the Montessori program and that emphasised in the Kamii program. The role is summarized as follows. 1. The teacher should be the provider of the environment and the helper of the children. 2. The teacher should respect the voluntary actions of children. While the teacher`s roles are shown to be similar in both programs, her functions turn out to be different in each program. One of the roles of the teacher in the Montessori program is to provide the settled environment and to repair the damaged materials immediately. But she need not and should not introduce a new environment in addition to the existing environment. On the other hand, it is necessary for the teacher in Kamii program to provide a variety of ample environment and produce new environment during the process of Childrens activities. In the second role, the teacher in the Montessori program should take up the position of a complete non-interventor once the children concentrate on their work. The Montessori program puts emphasis on the principle on non-intervention of the teacher and lets the children realize and correct their errors. Likewise, the teacher in the Kamii program is not allowed to teach in front of the children. This program also encourages the children to experience many different ways of being `wrong`. The teacher intervenes occasionally but she should be very careful in the intervention, and the success depends on the development of children`s activities in consequence of such intervention, that is to say, the teacher should play a role of motivational stimulator. To conclude, we reconfirm that one cannot carry out the teacher`s role successfully in a specific program without a clear understanding of the basic principle and the purpose of the program.