This research was administered with the aim of comparing men and women's attitude toward the fairness of the world for male and female. To meet this aim, 1176 persons from various regions in Isfahan city were randomly selected using a multi-stage sampling method. The questionnaires used in this research were prepared for the first time. The value of Choronbach's alfa for the fairness of the world for women and men questionnaires was 0.798 and 0.811 respectively, The test-retest reliability for the research instruments was 0.82 and 0.85 respectively. The results showed that, women have negative attitude towards issues such as the world treats women fairly, women get what they deserve, women treat each other fairly in life, women earn the rewards and punishments they get, women get what they are entitled to have, women's efforts are noticed and rewarded, and deserving the misfortunes they encounter and have bring upon themselves. However regarding the fact that women treat each other with the respect they truly deserve, the respondents showed positive attitude. Men in above domains have average attitude particularly towards issues such as women earn the rewards and punishments they get, women get what they are entitled to have, women treat each other with the respect they deserve, and women deserve the misfortunes they face. With regards to the "fair world" for men, women have negative attitude towards, the world treats men fairly, men get what they deserve, and men treat each other fairly in life. But have average attitude towards, men get what they are entitled to have, and have positive attitude toward, men earn the rewards and punishments they .get, men treat each other with the respect
they deserve, men's efforts are notched and rewarded and toward, men deserve the misfortunes they encounter in life. Men in this area (about the fairness for men) have positive attitude particularly toward, men get what they deserve. Finally results of independent sample t-test showed that, there is significance difference between men and women in the (notion of) "fairness world" for women (P< 0.01).