The main topic of this thesis is the segmentation of the dishwashing detergents market in the Czech Republic. The aim is to reveal segments that will be internally homogeneous and heterogeneous at the same time and then propose a suitable marketing approach for each of them. The thesis is divided into two parts, theoretical-methodological and practical part. In the theoretical-methodological part of the thesis are defined terms, procedures and methods of market segmentation and consumer behavior. The Czech market of dishwashing detergents is defined as well. The practical part deals with the market segmentation itself, which was based on the MML-TGI data of agency Median and on the basis of the primary data obtained through the own question...