Social capital as a concept which is related to social contextand as a new element besides other factors like environmental, Genetic and individual factors has attracted interests of professional and authorities in national and international levels. This approach has attracted attentions in low-income countries which have source limitations for interventions. This paper introduces concepts regarding social capital and health relationship, and a review on experimental and theoretical literature as well. A review research conducted by reviewing scientific databases on the net.The study includes English & Persian papers published thought 1990-2009 which studied empirically or theoretically the relationship between social capital (and its components) and physical or mental health. Empirical results shows some evidence for the positive relationship between the two, but in some social contexts, factors like poverty, violence and individual differences (like gender) may result in decreasing of intensity of or disappearing the relationship. Thereare three main theoretical mechanisms to explain the relationship: promoting pro-Health behavior, facilitating access to services and the effect of psychological process. Finally critics and limitations in the study of social capital and health relation is explained.