Purpose: Aim of this study was to investigate the abilities and limitaions of the acquired and congenital child amputees in functional activities with and without prostheses. Material and methods: A total of 41 children (21 congenital, 20 acquired) whose ages varied between 8-17 years participated in the study, Prosthetic fitting, prosthetic training and rehabilitation were given to the children after general physiotherapy evaluations. The assessments were performed in their first attendance, after 3 weeks of prosthetic training and 6 months after their discharge. The Child Amputee Prosthetic and Project Fuctonal Status Inventory were applied with and without prostheses. Results: It was seen that there was no significant difference in the physical characteristics of two groups (p>0.05). The evaluation of data between the groups showed significant difference in favor of the congenital group with respect to CAPP-FSI in the first and in the second assessment done 3 weeks after (p<0.05). There was not any significant difference between the two groups when the same evaluations were performed 6 months after their discharge (p>0.05). An important difference was found to be between the data of the three evaluations in both groups (p<0.05). Discussion: Child's active participation into rehabilitation program is important for early acceptance of prosthesis and ensuring social adaptation by increasing its functional use.