eng Science and Education Publishing Journal of Business and Management Sciences 2333-4533 2016-10-18 4 4 98 104 10.12691/jbms-4-4-4 JBMS2016444 article Sirine Gha Sirinegha@yahoo.fr 1 Nejia Nekaa 1 Financial Methods and Accountants, The Faculty of Economic and Management Sciences Sfax The Islamic finance constitutes an ethical finance saw that it encourages on investment in sectors socially responsible. It prohibits the investment in the areas of illicit and supports the distribution of profits and losses. In this study, we have studied the efficiency of 21 Islamic banks on a global scale in a period of 5 years from 2010 to 2014. We use in this context the following ratios ESOP, ROAE, Ooi, CTI, denies to apprehend the overall profitability and the method of the wrapping of the data (DEA) to calculate the scores of efficiency. http://pubs.sciepub.com/jbms/4/4/4/jbms-4-4-4.pdf efficiency Islamic banks analysis by ratios DEA