The aim of this article is to give an overview on rule of law and administrative procedure in Finland. In addition，there are also comparative aspects from Nordic countries，other European countries，the Council of Europe，and the European Union. The article begins with an old Nordic adage “The country must be built by law”，which is still an important starting point in decision-making in the Nordic countries. The concept of rule of law has been partly changed during the last decades：nowadays it does not mean only a formal but also a real legal security in the administrative decision-making. Legal security is provided to reach a lawful decision in a concrete matter. In addition，the decision must be just and fair，too. In other words：legal security is achieved，when such a decision has been made by an administrative authority.