Is a method of finance compliant with the provisions of Islamic law and contracted to buy what will be manufactured according to agreed specifications, for example to ask the financing applicant (the manufacturer) of the bank to manufacture any kind of equipment so that the bank buys raw materials and sell them to the manufacturer for a certain price The bank uses this method to finance the various industries and construction of the building so that the price of Istisnaa is paid in installments agreed upon and paid to the manufacturer immediately or according to the development stages of completion, and is held by a contract between the bank and the customer requests the customer from The bank makes a certain eye, such as a house or a road, for example, if the bank agrees to contract with a manufacturer to make the work.