This guide describes the conditions for exploration in Finland’s protected areas. It is intended for exploration and mining companies, and for permit and supervisory authorities. The guide also describes the most important matters to be considered when carrying out exploration and mining in the Sami Homeland and the reindeer herding area in northern Finland. The ecological values of the areas and the legal basis for their protection determine what measures can be carried out in each area. The guide is in two parts. The first chapters sum up the legal basis for exploration, describe the different types of protected area, and the principles and procedures for exploration in protected areas and the Sami Homeland. The appendices give a detailed description of the protected areas and the exploration and mining process. They also give instructions on how to apply for claim rights and survey permits in protected areas. The purpose is to provide the prime target groups (Finnish and foreign exploration and mining companies, and the permit and supervisory authorities) with all the necessary facts.