The human capital has been considered as the most important factor in the economic growth models. On the other hand, social capability has been seen one of the factors of the economic growth social capital and trust as its main element have gained a vital role in economic growth studies. This paper studies the relationship between growth and social capital. The results show that the social capital has a significant effect on the economic growth. On the other hand, the economic factors could have an important role in improving or declining the social capital.