The study was to investigate the changing process of an autistic child\'s life at school through a qualitative research. A boy who has been diagnosed as an Autism, was selected. In order to get the resources, general observation and in-depth interviews were employed. The results of the study were as follows. First, the changing process of the autistic child\'s life at school was observed in the stage of physical integration with no educational support. In the stage of physical integration, where the class was integrated for the sake of qualitative integration of the child, there was no educational support offered; the child revealed his autistic tendencies. Second, the educational support was given in the academic aspect. The school subjects were revised and all those efforts were made as the investigator got together with a special teacher to discuss the curriculums at the Curriculum Revisions Council and to revise the curriculum of cooperative learning-based social studies and that of science for the child with autism. Third, there were changes to him both in the academic and behavioral characteristics aspect after the educational support was given. The changes were as follows; in the academic aspect, the negative sides of the child revealed in the early semester gradually disappeared as the educational support was given. Thus, the results showed that his learning abilities increased, his own one-way interactions changed to the two-way interactions, his aggressive and defensive attitudes decreased, and his cooperation and autonomy increased. In the integrated class, the autistic child\'s school life went through very positive changes.