Equity is the prime virtue of social institutions, and its role is as truth is for human thought system. Equity has been studied in various areas such as economics, politics, and judicial system. One of the areas of social equity that has recently been considered by experts is health. Health is defined as complete physical, mental, and social well-being. Health refers not only to the physical well-being, but also focuses on social, emotional, spiritual, and cultural well-being of the whole society. Equity in health could be defined as absence of unfair disparities in health. Since social equity and fairness can be interpreted differently by different people, its definition requires measurable functional criteria. For the purpose of functionality and measurement, equity in health can be defined as absence of disparities or systematic prejudices (or in the most important social determinants of health) among social groups with varying levels of social entitlement or deprivation in the social hierarchy. Health inequities systematically expose socially deprived groups to problems associated to their future health. Social entitlement or deprivation, based upon wealth, power, and prestige, determines how people are grouped in the social hierarchy. Deprivation may also be understood as being deprived that can be absolute or relative. Not all health inequities are unjust, only those specific health inequalities systematically created between more and less entitled social groups are unjust. For instance, we expect young people to be healthier than older people. It is expected that baby boys weigh more than girls at birth. Men have prostate cancer problem and women do not. It is hard to judge all these inequalities unfair. Even though differences in nutrition or immunization between boys and girls, or differences in ethnicity or race could be a major concern to equitable approach in likelihood of receiving proper treatment for heart attack.