Advertising and product quality play a vital role in increasing visibility, creating consumer image and trust in the brand or product offered. In addition, it has been proven that product knowledge plays an important role as a link between advertising and product quality and consumer purchase intention. Therefore, the purpose of this study is to investigate the effect of advertising and product quality on consumer purchase intention with regard to the mediating role of product knowledge in Dashtestan date customers. This study is an applied research in terms of its purpose and a descriptive-survey in terms of data collection method. The data collection tool is a questionnaire. The statistical population of this study is Dashtestan date customers, who were selected as a sample by simple probability sampling method due to the unlimited size of the statistical population. The validity of the questionnaire was determined through convergent validity and the reliability of the questionnaire was determined through Cronbach's alpha, which was above 0.7. The research hypotheses were tested with the help of PLS3 and Spss26 software. The results showed that product advertising, product quality and product knowledge have a significant effect on consumer purchase intention. Product advertising and product quality have a significant effect on product knowledge. In addition, product knowledge has a significant effect on the relationship between product advertising and consumer purchase and on the relationship between product quality and consumer purchase.