The thesis deals with deterrence of terrorism. The aim is to assess validity of a proposition that it is possible to deter nonstate actors and specifically terrorist groups, however, there are some specifics in comparison to the deterrence of states. The thesis determines deterrence threats which can be applied in relation to terrrorist groups and discusses possible restraints of their application in practice. It also deals with the question of whether deterrence can be applied against all types of terrorist groups without distinction and develops a model of classification of terrorist groups according to the goals which they pursue.