War captivity is a highly traumatic experience which sometimes has deleterious effects on both ex-POWs and their wives. This study examined the relationships between posttraumatic stress disorder (PTSD) symptoms and differentiation among male ex-prisoners of war (ex-POWs; n = 103), their wives (n = 82), and comparable controls. Results show that ex-POWs and their wives endorsed more PTSD symptoms than controls. Ex-POWs endorsed more cut-off and fusion than controls, while their wives endorsed only more fusion than control wives. Finally, the relationship between differentiation and PTSD was found to be stronger among ex-POW couples than among control couples. The unique characteristics of war captivity and the relationships between avoidance symptoms and cut-off were suggested as possible explanations.