The thesis deals with the problem of in-store tastings performed in retail institutions with the participation of promoters. The main aim of the thesis is to find out the level of tasting ethics from the point of view of both attending sides - promoters and customers. In order to gain a comprehensive view of tastings, we have been investigating how they are being perceived by customers. The objective has been achieved by carrying out a questionnaire survey focused on both groups of participants separately. The questionnaire survey was preceded by a detailed study of the available domestic and foreign literature resources. We have processed the overview of the issue in the theoretical part of the thesis. The practical part is concerned with the analysis of obtained data from the survey, and thereafter their analysis. We have elaborated the results in detail, moreover, evaluated sufficiently. On the basis of observed results, we have subsequently proposed some corrective measures in the area of ethics of tastings. We are convinced that the main goal of the work has been fulfilled and the observed results will become a benefit in practice.