International Medical Corps’ Toolkit aims to support the understanding and implementation of integrated mental health programs in humanitarian settings. It includes key guidance and resources that reinforce the integration process among implementation partners, donors and governments. The toolkit outlines the steps for integrated mental health programs and provides valuable guidance for better resource allocation, program design, contextualization, implementation and evaluation. The Toolkit is the result of a two-year process of consultation, resource-mapping and development with a Toolkit Advisory Group. This Toolkit was made possible by the generous support of the U. S. Agency for International Development’s Office of U.S. Foreign Disaster Assistance.