Participatory theatre is an approach in which the actors interact with the public. Throughout the event, the public participates to adapt, change or correct a situation, an attitude or a behaviour that is developed during the show. The NGO "Search for Common Ground" combined forum theatre techniques initially developed by Augusto Boal in Brazil in the 1960s with its own approach aimed at seeking collaborative rather than adversarial solutions to conflict in war-torn Eastern Democratic Republic of Congo. This training manual first gives a brief introduction to participatory theatre and conflict transformation in general. Then, based on the experiences of over 600 performances, it presents practical guidelines for developing a participatory theatre process. They include: information collection; compiling information; scene development; character development; preparation of the performance location; interaction with spectators; and the skills of the conductor. Also some risks of participatory theatre are very briefly touched upon. This publication may not be sufficient to be put in practice by persons without theatre experience, as it does for example not offer practical advise on acting itself. Nevertheless, this is a very helpful introduction to the underlying principles of participatory theatre.