Advertising is a mix of a promotion. Selection of Barcelona as a brand ambassador in Advan ad begins cooperation contract agreement PT. Intech Surya Abadi with Barcelona football club. Suarez, Jordi Alba, Iniesta, Pique and Messi became Barcelona's chosen representative as brand ambassador in the ad. They are a very important figure in the club's innovative Barcelona.Cara was conducted by PT Surya Abadi Intech in its efforts influence consumers to buy products that have been offered, namely Barca Advan Smartphone products. Subjects were fans club IndoBarca Yogyakarta as many as 100 people are registered as members of an official nature in a community of football fans. This type of research survey research. Survey is a kind of inquiry or research using questionnaires as the main data source. The sampling technique using accidental sampling. Samples are fans club IndoBarca Yogyakarta as many as 100 people. The technique of collecting data using questionnaires. The validity of using CFA and reliability test using Cronbach alpha formula. Data were analyzed using simple regression analysis. The results showed that there are significant endorser credibility Smartphone Advan against buying interest for the fans club IndoBarca Jogja. This may imply that kredibiilas Endorser contribute significantly to the success of the product. Endorser who has the knowledge, expertise or experience relevant and can be trusted to provide objective information and not bias will be able to persuade compared with a source (endorser) that lack the expertise and untrustworthy. The existence of a credible endorser as interpreter communication is believed to elevate brand awareness and foster interest in buying the fan club Barcelona in Yogyakarta on Smartphone Advan.