An experimental research was conducted to study student's acceptance of environmental transformation and their behavior toward it in the classroom, by means of observation of the student's behavior and a questionnaire of free description form. Students of an elementary school and a junior high school experienced an experimental classroom of which ceiling height was set to 2.4m, 2.7m or 3.0m. As a result, it was confirmed that the students' reactions are different according to the ceiling height, the school age, and the date. Students not only reacted to the ceiling but also showed the reaction toward the objects lowered by lowing of the ceiling.
