For long, the name Borzooyeh, the Physician has been used inter changeakly or together with Bozorgmehr, the Philosopher. However, from historical point of a large number of Pahlavi manuscripts, the change in handwriting, oral transmission of history in different versions - hence. Incompatible narrations. Therefore, the information by the historians of early centuries of fictional. As a result, there are different versions of the biographies of personages, ministers and even kings. The aforementioned discussion has also been the concern of some orientalists such as Noldeke and Christenson. They have talked about Bozorgmehr, the philosopher, whose name is associated with "Kelileh- va- Demneh" on the one hand, and the minister whose philosophical words shine in different Persian texts. In his four arguments in "Bozorjpmehr, the Philosopher," following Noldeke, who considers Bozorjomehr as a legendary character, Christenson comes to the conclusion that "I think Bozorgmehr, the mysterious philosopher, is the same Borzooyeh and no one else." the historical Bozorgmehr or Borzooyeh, who is neither a minister, nor a politician, nor a philosopher, and whose only achievement is "Kelile- va- Demneh". In this essay, the researcher proves that Bozorgmehr and Borzooyeh are the same figures with references to historical and literary evidences and rejects allusively Christenson's arguments in not considering Bozorgmehr = Borzooyeh as a historical figure. The research is concerned with a Borzooyeh (= Bozorgmehr), who is a philosopher and a minister, who has composed" Kelileh- va- Demneh", and who is the one who introduced chess to Iran.