The purpose of this study was to consider the group psychotherapy program for the children with developmental difficulties, especially in adolescence. In the therapy, to promote children's self expression and interactions between children, group leader made a program that is called "Program designed by children". In this program, self-expression and mutual interaction with other children was important aspects. The programs applied during a year were; 1) play programmed by group leader. 2) Program designed by children, 3) Psychodrama. Each therapist supported child designing the program in considering the functional levels of child's ability and their spontaneity. Some examples of program including the rules, tools used in the sessions were introduced in this paper.