The aim of this article is to show destiny - centered structure of tragic stories of Shahnameh. In tragedy, there is an inevitable thing that the hero of story is not able to prevent it, in order not to amortize him. It is called definite destiny or fate. All heroes of tragic stories of Shahnameh, are defeated by it, and when they are faced with a network of cause and effect, despite all their attempts and determination, they admit defeat, and inevitability of their fate. So, they accept the order of destiny and believe that, whatever should be done, will be done and you have to accept it. So many elements form destiny- centered structure of the tragic stories of Shahnameh; ignoring just one of them will affect the whole work. Studying the elements will make it possible to analyze the structure.