The objective of this study was to observe real-world inclusion of children with Down Syndrome (SD) in physical education classes in school. Furthermore, we identified possible hindering and facilitating factors during classes. This analysis was performed through systematic observation of physical education classes during the school year. Thirty-three (20 boys and 13 girls) 3rd grade students and one nine years old boy with SD served as subjects for this study. The student with SD did not show difficulties in understanding and performing activities during practice. However, he did not easily establish social relationships with his peers.183237256