Postnatal depression (PND) is a serious and debilitating condition that is recognized as being disruptive to women's lives at a time when they are already under stress adapting to the demands that a new baby creates. What has not always been fully acknowledged is that PND is linked with elevated levels of depression in male partners. In this article, the authors report on men's experiences of PND and of participation in a 6-week group treatment program specifically designed for male partners. The men experienced their partners' PND as overwhelming, isolating, stigmatizing, and frustrating. Coping with PND was assisted by participation in the men's group. Men reported lowered levels of depression and stress, and higher levels of social support, as a result of their participation. The men valued highly the opportunity to share experiences with peers, to hear strategies for engaging in their relationship, and to gain factual information.