The main goal of the current research is to compare the role of classes and social groups in the constitutional revolution and the Islamic revolution. Middle class: In both revolutions, this class included market strata and technocrats. Working class: In both revolutions, the cause of the protest of the working class was economic stagnation. Peasant class: One of the reasons for the rebellion of this class in both revolutions was the weakness and crisis of the established government. The landed class: In both revolutions, there were reforms by the government to supervise this class. Intellectual class: The central point in both revolutions was the struggle against imperial tyranny. Bazari class: In both revolutions, the Bazari wanted to dominate the political and economic destiny. The clerical class: The main goal of the clerics was to destroy the king's absolute power.Middle class: In both revolutions, this class included market strata and technocrats. Working class: In both revolutions, the cause of the protest of the working class was economic stagnation. Peasant class: One of the reasons for the rebellion of this class in both revolutions was the weakness and crisis of the established government. The landed class: In both revolutions, there were reforms by the government to supervise this class. Intellectual class: The central point in both revolutions was the struggle against imperial tyranny. Bazari class: In both revolutions, the Bazari wanted to dominate the political and economic destiny. The clerical class: The main goal of the clerics was to destroy the king's absolute power.