This study is aiming for evaluating the factors influencing rehabilitation medical desire in parents (RMDP) with developmental disability children. This study was made with a randomized sample of 156 parents, who were given a questionnaire about how they feel medical needs for their children. The results of the study were as follows: The RMDP is significantly high in relatively the older aged parents group(p<.01). The RMDP is significantly high in severe disability group(p<.01). The RMDP is significantly high in the more spend group of monthly medical cost(p<.05). The group difference of RMDP by monthly income or movement type of disability is not significant(p>.05). It is thought that medical staff need to be actively involved in parents group with developmental disability children to improve motivation, who is relatively the younger than 35 years old or has mild to moderate disability degree of child.