Banking system as the most important and strongest financial institutions in the economy plays a key role in economic development in societies. In Islamic economics financial institutions should planned and implemented their activities accordance with Islamic law or Shariah. Islamic banking system in the Islamic economics has a unique and facilitating role in flourishing businesses, production and trade and finally reach to the ultimate goal namely development with social justice. To achieve this purpose Islamic banking should able to attract customers and gain their satisfaction in order to attract micro-savings and turn them into a massive investment to promote economic prosperity and development. Acceptance the Islamic banking plans and approaches by the customers are the key. Hence, this research aimed at identify and explain key factors affecting Islamic banking acceptance among banks and financial services’ customers in Iran in the form of a conceptual model that can be theoretically and applied a high contribution. This research designed based on the mixed method approach namely both qualitative and quantitative phases have been implemented; first in qualitative phase using detailed literature review and research background and in-depth interviews with experts the research conceptual model has been provided, then in the second phase-quantitative- using survey method required data has been gathered from the customers of banking and financial institutions. Most significant finding of this research is the confirmed conceptual model to explain the Islamic banking acceptance among banking customers.
