War and violence destroy communities and countries all over the world, and have a devastating impact on the mental health of millions of people. These ICRC guidelines outline the organization’s approach to mental health and psychosocial support (MHPSS) during and after armed conflict and other situations of violence. They provide a framework for harmonizing MHPSS programmes within the organization, and an insight into its strategic processes and field practices. This publication is not intended to serve as a training manual for specific MHPSS techniques. In sharing these guidelines with an external audience, the ICRC aims to raise awareness of its approach among professionals and other interested parties.