The aim of this study was to compare forgiveness in secure and insecure Iranian married couples. Whether marriage had occurred within the family (consanguine) or not (non-consanguine) was also considered. 400 married participants completed the Family Forgiveness Scale and the Adult Attachment Questionnaire. Analysis of reported forgiveness within the marital family showed that, although there was no significant difference between secure and insecure participants in overall forgiveness, secure participants rated "reparation" and "resolution" higher, whereas insecure participants rated "realization" and "recognition" higher. Comparing the experience of forgiveness in the family of origin, securely attached couples not only reported significantly more overall forgiveness but reported more "realization" and "resolution" while forgiving. Some interesting sex differences were also found, as individuals in consanguine vs non-consanguine couples differed in mean "recognition" in the forgiveness process.