Fracture-dislocation of the sacrum that has not yet fully developed is common in the distal sacrococcygeal joint of children, but this injury is rarely seen in 1^st Sacrum. Most of these patients have a severe neurological deficit, so this injury generally requires surgical decompression. We managed a three year old patient who had a S1 fracture-dislocation without a neurological deficit, and the patient was treated with simple skin traction and bed rest without surgery. The child had a satisfactory result, so we report on this case with reviewing the relevant literatures.