We have tried, through this research paper, to define the theoretical definition of Islamic banking, its products and conditions for its practice. After familiarizing with the theoretical aspect of it, we tried to give a picture of the reality of the adoption of Islamic banking in Algeria, which is governed by the bank of Algeria regulation No. 02-2020.The study concluded that the inclusion of Islamic banking in the legislative framework of the delay in its issuance. However, he encouraged the generalization of the adoption of Islamic banking within banks, by allowing traditional banks to open windows Islamic. [ABSTRACT FROM AUTHOR]