The research is oriented to the analysis of participation in the labour market. The research question, which the project answers, is how social exclusion from the labour market (unemployment) in the second half of the 90s and at the beginning of 21st century in the Czech Republic has been changing. Since the unemployment rate is affected by the availability of work places and by the number of people in the labour market (structural conditions of unemployment), it is more appropriate not to speak about unemployment itself, but about the chances of being unemployed (and their development), which are free of structural changes in the labour market. The unemployment analysis is aimed right at these chances of being unemployed. The data for the analysis come from The Czech Statistical Office. We speak about exhaustive inquiry of the unemployed, from which a random sample of 1% will be chosen. The chosen methods for the analysis are logistical regression and log-linear analysis. With the help of these methods, the project will answer the following questions: Is the chance of being unemployed different according to age, sex and education in time – between 1998 and 2004 in the Czech society? Who has the smallest and on the contrary who has the highest chances of being unemployed? What types of the unemployed in the Czech Republic may be identified? Is there just one class of the socially excluded from the labour market, or are there more of them? And how many of such classes can be identified in the Czech population? How do they differ from each other? These are the main questions which the project will answer.