The aim of this work was to identify and describe the main segments and individual types of customers of the drugstore chains on the basis of their identity and consumption behaviour and subsequently to make suggestions and recommendations for drugstore chains. The whole thesis is divided into two parts: theoretical and practical. The theoretical part of the thesis is devoted to the literature review, which was based on the study of professional books and articles. It presents the basic definitions and concepts related to the issue. It mentions the term consumer, consumer behaviour, describes basic approaches to consumer behaviour monitoring, factors influencing consumer behaviour, purchasing decision-making process, market segmentation and consumer typology in various aspects. In the practical part, quantitative marketing research was conducted in the form of a questionnaire survey. Based on the results, consumer segmentation was performed according to demographic features such as gender and age, as well as the preferred drugstore brand. Each segment was analysed and described in detail in terms of purchasing behavior and based on the resulting data, some suggestions and recommendations for drugstore chains were created.