This study attempted to investigate the current state of the public integrated classroom and derive improvement plans. A survey on satisfaction and perception of the integrated classroom was conducted on 156 parents of children with disabilities and without disabilities in public schools in a metropolitan area. First of all, the level of awareness about the integrated classroom has considerably risen, and 67% and more children and parents supported the mandatory requirement of the integrated classroom whereas only 7% as opposed to it. However, contrary to this change in perception, the majority still answered that the special classroom for the disabled rather than the integrated classroom would be more appropriate. The biggest concerns from the parents of students with disabilities were that the students have difficulties in keeping pace with classes in Korean, English, and Mathematics (83%), and keeping good friendships (53%). It was also found that the parents of students without disabilities who had some positive perceptions in the integrated classroom changed negatively after experiencing the integrated class. The results were compared with the case of “inclusive education” in Japan, which was designed to overcome the distinction between the disabled and the non-disabled, and to attempt to carry out the integrated education from the point of view of “inclusion.”