The object of this paper is to study the theory of the finance and the Islamic banks through their concepts and logics of functioning. We focus on the analysis of the banking performances, in particular in terms of profitability which has a big interest to allow the banks to arrest the factors which act on their profitability and of offering them so better control levers of action, control and forecast. What requires a definition of the internal and external determiners of the profitability of Islamic banks? We suggest approaching this question from the specification and from the estimation of a model which integrates at once organizational, exogenous and macro-financial measurable aspects. The empirical analysis was focused on the determiners of the Islamic banking performance. Our study which concerned 10 Islamic banks in 10 various countries showed essentially that the profitability of asset constitutes the main explanatory variable of the banking performance. The performance is positively correlated with CTA and negatively with ASITA. Concerning the externals factors, the profitability is weakly explained by the rates of inflation and growth.

KEYWORDS: Islamic finance, Islamic banks, riba, chariaa, performance.