Islamic history abounds in bone men who wrote its major incidents in letters of light that radiates their goodness and benefit to people, so they have the right to the male. Among these "Omar bin Al -Khattab" is one of the great companions of the Prophet, and the fair caliph Al -Rashid, Omar al -Islam was a major turning point in his life; Where he appeared as a strong person, a decisive opinion, asking for the truth, may God cherish Islam, and he was the back of his Muslim brothers against the injustice of ignorance, so he accompanies the Prophet and serves the call of Islam with all his energy, then he becomes the successor of the Muslims after the death of the first caliph, "Abu Bakr", so he praised the pillars of the nascent state and expands from its area He also takes care of the interests of her children in justice that is not without mercy. This book is a study of the aspects of Omar's personality and his psychological appearances and identifying the keys to his personality, to understand this genius character more.