The significant amount of the e-commerce in Indonesia has made the competition among them to be tough and keen. It is proved by one of the unicorn that has to fire hundreds of their worker by efficiency reason. One of the problem solution is to develop customer patronage intention. Many previous research has been conducted about patronage intention, nevertheless research about patronage intention toward ecommerce is still rare in Indonesia. The purpose of this research is to determine factors and how they affect the Indonesian customers’ patronage intention toward ecommerce. Based on grand theory of theory of reasoned action (TRA) and expectation-confirmation theory (ECT) researcher construct research framework to explain patronage intention and find out factors that drive customer patronage intention. Web design, privacy and security, information quality, payment method, e-service quality, product quality, product variety and delivery service as independent variables; and satisfaction is as a mediating variable. With research methodology of quantitative approach, researcher uses purposive sampling method to distribute questionnaire. The predictors in this research explained 67.6% of patronage intention toward ecommerce. All the predictors have positive and significant influences toward ecommerce patronage intention except for privacy and policy. The product variety is the most positive and significant factor.