The purpose of this guide is to provide updated clinical guidance on TB/HIV, with an emphasis on diagnostic aspects—including new techniques—as well as current treatment, while maintaining a public health approach. By compiling and consolidating the latest World Health Organization recommendations on the subject into a single guide, the aim is to create a reference and consultation document that is frequently used, and that unifies and standardizes the comprehensive management of TB/HIV co-infection in healthcare facilities based on the principle of “two diseases, one patient.” It also seeks to support the updating of national standards and guidelines on co-infection and to complement the coordinated work that must exist between TB and HIV prevention and control programs at all levels, within the framework of the twelve internationally recommended TB/HIV collaborative activities.