Abstract Background: The protective role of parenting factors on the mental well-being of children exposed to war trauma remains an under-researched area. Aim: To establish the relationship between perceived positive parenting support and post-traumatic stress disorder (PTSD) symptoms in children exposed to war trauma. Methods: A random sample of 412 children aged 12—16 years was selected from the Gaza Strip and was assessed using the Gaza Traumatic Events Checklist (GTEC), the SCID (DSM-IV) and the Perceived Parenting Support Scale (PPSS). Results: Palestinian children were exposed to different types of war-traumatic events. The number of exposed traumatic events was independently associated with the severity of post-traumatic symptoms scores or the diagnosis of PTSD, while perceived parenting support was found to act as a protective factor in this association. Conclusions: Interventions in war zones need to ensure the minimal possible disruption to communities and family units, and to involve parents in preventive or treatment programmes for children exposed to trauma.