A cross-sectional study was conducted among 286 Palestinian children 9-18 years of age and their mothers in the Gaza Strip. Traumatic events recollected by children living in areas of conflict, the prevalence of post-traumatic stress reactions and the relationship between children's and mothers' mental health were investigated. The Gaza Traumatic Events Checklist, Impact of Event Scale (IES) and General Health Questionnaire (GHQ) were used to measure outcome. Children experienced on average four traumatic events; one-third reported significant post-traumatic stress reactions. IES scores were higher among girls and mothers' GHQ scores significantly predicted children's IES scores.