We presented a left transfemoral amputee who had left acetabular fracture, separation of symphysis pubis, and traumatic brain injury due to motorcycle accident. Initially, his mental status was stupor, and his left acetabular fracture was malunion status. So, we planned step-by-step prosthetic gait training. Via outpatient clinic, we checked his cognitive function status and union of pelvic bone fracture. After his cognitive function was improved, he re-admitted to our hospital, and we measured his prosthesis. During the second admission, he showed poor standing balance, decreased muscle power and pain of left pelvic. After his standing balance improved, he re-admitted to our hospital, and he got a gait training. He underwent fifty-days gait training, he achieved indoor ambulator with unilateral monocane that was his functional goal.