The purpose of this study is to create a sustainable business model of Islamic banks in Indonesia through financial and non-financial aspects with financial performance as a mediate variable. The study uses quantitative approach by collecting secondary data of Islamic Banks from financial statements and annual reports over the period 2010-2018. The population of this study is 9 (nine) Islamic banks and the sample of research uses the census method. Data processing methods uses Partial Least Square. The results of the study stated that corporate governance has a significant effect on financial performance, intellectual capital has a significant effect on financial performance and company size has a significant effect on financial performance, but corporate governance has no effect on sustainable business. In addition, intellectual capital has a significant effect on sustainable business but company size has no effect on sustainable business. Moreover, financial performance has a significant effect on sustainable business, financial performance mediated the effect of corporate governance on sustainable business, financial performance partially mediated the effect of intellectual capital on sustainable business and financial performance mediated the effect of company size on sustainable business.