Chance fracture, suggestive of a flexion-distraction mechanism, is an uncommon type of injury in the pediatric population. Its occurrence, with associated intra-abdomimal lesions, has increased with the widespread use of seat belts. Since this type of fracture presents subtle variations on common image examinations, its diagnosis may be delayed increasing the probability of subsequent neurologic deficits. In this paper we report the case of three siblings, victims of a motor vehicle head-on collision,either presenting seat belt fracture or Chance fracture. They were treated in the Hospital João XXIII, Belo Horizonte. The case reported reinforces the hypothesis describing the fracture mechanism and associated intra-abdominal injuries.