During Indian struggle for Independence British government passed a law named after Sidney Rowlatt who was a government official, whose work was to find out who were behind Indian independence support and stop the changes responsible for the Independence were mainly.Three officers in this commissin and all were Britishers. Indian freedom fighters called it “Black Law”. This Act gave the government enormous powers to repress political activities and allowed detention of political prisoners without trial for two years. The opposition against this law started with a hartal by Gandhi. Rallies were organised in many cities, workers stopped working, went on strike. Shops and workshops were closed. By this way the reaction of the people came out against this Act.