Purpose The purpose of this study was to examine the effects of parents’ involved dance-sports program on a physical activity level and a fitness of children with a developmental disability and on their parents’ perception. Methods The participants were seven children with a developmental disability ranged between 8 and 16 years and seven parents of them participating in the dance-sports program during 90 minutes, 3 times per week for 8 weeks. The quantitative data (i.e., the physical activity level, the physical fitness, and the questionnaire) were collected before and after the intervention. Results The results showed that there was statistically significant difference of the parents’ perception on children’s participation in a physical activity [F=5.63, P<.04]. Although the experimental group showed increase trend, whereas the control group showed decrease trend, there was no statistically significant difference of the physical activity level and the physical fitness of the children with development disabilities. Conclusions Parent participated dance sports program seems to be effective on parents’ perception on children’s participation in a physical activity, physical activity level and the physical fitness of the children with a development disability in experimental group.