Devaluation is the instrument of monetary policy which has been used very often during the 20th century. In recent time of globalization, the many limited factors (openness of the economy, capital movements, currency substitution, money illusion) significantly reduce or completely make impossible the devaluation implementation as the measure for foreign trade deficit or recession overcoming in many countries. This paper discusses on positive and negative effects of devaluation in the case of Bosnia and Herzegovina economy.