This diploma paper deals with the tax incidence of cigarette tax in the period of the changes in rates of this duty in the Czech Republic. The main aim of this paper is to find out how the cigarette tax shifts on consumer and producer. Moving of tax burden was found out thanks to investigation of cigarette prices in the period from September 2007 to February 2008. The amount of tax was calculated from these prices. Various periods were compared and results were closely analysed. Fiscal and educative function of cigarette tax was monitored in this paper too. Educative function was found out by the help of trend in the number of smokers and their cigarettes consumption, whilst fiscal function was demonstrated by trend of payment excise duties. At the close of diploma paper are mentioned also tax avoidances of the excise duty on cigarettes, that are large problem all the time not only in the Czech Republic.