This study aimed at  determining the effect of shelling and other traumatic events on the mental health of parents and children. The study included 200 parents and 200 children (age 9-18 years) who were assessed by self- completed questionnaire. The results estimated mean traumatic experiences for parents were 8.42, prevalence of PTSD in parents was 60%. For children, mean traumatic events were 7.88, prevalence of PTSD in children was 70.1%. There was correlation between trauma of children and PTSD , intrusion, avoidance, and arousal. There were no gender differences in both parents and children in PTSD. Parental PTSD was associated with their children's PTSD. These findings were discussed in relation to need for crisis intervention programmes in north of Gaza and West of Gaza and psychosocial programmes for both parents and children.