Amartya Sen’s Idea of Justice and his proposal for the question of injustice. To understand Sen’s idea of justice, his critique of Rawls’Theory of Justice should be considered. Sen’s Idea of Justice could be read as a critique of Rawls’theory of justice as well as a suggestion of a new approach instead. For this reason, Sen’s Idea of Justice is through his critique of Rawls’Theory of Justice. Apart from that, Niti and Nyaya human reasoning can differentiate between justice and injustice through the realization process in analysing in understanding Sen’s idea of justice. Adam Smith proposes the impartial spectator as the standard for moral behaviors in the Theory of Moral Sentiments”. Sen takes this notion and uses it in the realm of politics for the question of justice. Sen comes up with the Capability Approach as a solution to the question of equitable justice in his works.