The master thesis deals with brand image and identity, the difference between brand perception from the customer point of view and from the creator point of view. The thesis is divided into theoretical and practical part. In the frame of theoretical part there is a brand definition, its components, functions which are the most important part of brand building since it is necessary to see the advantages of brands. This master thesis looks in details on brand value and models for measuring brand value. The practical part deals with market research through questionnaire, which is a base for evaluating image of the adidas brand. On the basis of the survey results the recommendations are made at the very end of the thesis