Although inclusion had been emphasized in the field of special education in Taiwan, ”exclusion within inclusion” exists. Students with disabilities are frequently rejected, isolated, or publicly criticized by peers in inclusive environments. In this article, the author explored the issues of peer-relationship among students with disabilities based on the ecological systems theory, and thus intended to understand the factors involved. The author re-interpreted the meaning of difference for inclusion and isolation based on the equality and justice, and further attempted to provide information regarding issues in implementation.