IntroductionParticipation in a traffic accident is a situation harmful to health and/or life of the individual, and from this point of view it is considered as a traumatic situation. AimThe target of the paper was to reply a question whether a phenomenon of posttraumatic growth appears in children and adolescents – victims of traffic accidents as well as to determine whether a social support would increase a probability of its occurrence. Material and MethodsThe examined group was composed of 71 persons – children and adolescents at the age of 10–16, who experienced a traffic accident. The posttraumatic growth was measured with the application of the Personal Growth Questionnaire – KOW-27 (D/M) elaborated by N. Oginska-Bulik. In order to estimate a social support level, the Social Support Scale developed by K. Kmiecik-Baran was applied. Results and ConclusionsFrom the obtained results it appeared that children and adolescents who suffered trauma connected with a traffic accident, presented an average intensity of posttraumatic growth. 18.3% of the respondents revealed a high degree of posttraumatic growth, 42.3% – a low degree, and 39.4% – an average degree. The social support is positively linked with some of its dimensions. An instrumental support - as found in relatives – helps to improve relationships with the others, whereas an informative support – as received from teachers – increases a probability of positive changes in self-perception.