The aim of the study is to identify the association between the severity of maxillofacial trauma and its origin. The study has included 58 cases of facial bone fractures in children of different ages received in different circumstances. All patients were treated in Maxillofacial Department of Voronezh Regional Pediatric Hospital № 2. In this paper it is shown that the gravity of the injury is directly dependent on the forces of the action of damaging factors, which is determined by the circumstances of an injury. The injuries are divided into two groups: low-speed trauma group and high-speed trauma group. The study has proved the necessity to reveal the separate group, i.e. medium-speed group of the traumas typical for children (a fall from a bike, a playground trauma). The results of this study are the following: the most frequent trauma in children is a low-speed trauma (a fall from one’s height, a criminal trauma), the most severe trauma is a high-speed-one (a high fall, road-traffic accidents, a blow into a face from a cattle).