Ismart Ponorogo is a retail store that is managed based on Islamic principles. Congregational ownership, managed professionally and centrally to maintain competitiveness in terms of distribution networks, products, prices and promotions. This research aims to test and explain the influence of Islamic brands on customer loyalty to Ismart Ponorogo. The research uses explanatory quantitative research methods conducted through data collection in the field in a quantitative approach. The assumptions used in this study are variables that can be measured using respondents' responses with questionnaires, the consumer population of Ismart Ponorogo, and a sample of 67 respondents, data analysis using linear regression statistical methods and hypothesis testing. Based on the results of the research shows that Islamic Brand can increase customer loyalty to Ismart Ponorogo. This research has a novelty compared in consist of aspects of quantitative research approach with variable Islamic brands and customer loyalty that in previous research has never been raised to test islamic brands at retail Ismart Ponorogo. In addition, this research is interesting to do because it uses aspects of the company based on sharia values, which generally have different characteristics than conventional companies.