The economic development points out the importance of the development study of sectors and branches of economics, because they can deepen or moderate volatility of the economic cycle. The article aims at mapping the rate of unemployment in the primary, secondary and tertiary sector in the Czech Republic. With using the HP filter we estimate NAIRU. The comparison of the actual rate of unemployment with the average value NAIRU was used for the specification of the economic cycle. We compare the rate of unemployment, NAIRU and unemployment gaps in sectors with the average value on the national level too.