This essay attempts to define law and justice in The Merchant of Venice, focussing on the characters of Shylock and Portia. Shakespeare proposes ideas of law and justice that hold truth in the play. Law and justice play a key role in determining the outcome of the play. The result of this study is that the writer emphasizes social justice through the character of Portia. To achieve the aim, the study has mainly focused on the vicious act of Shylock and the wise judgment of Portia. Shylock is a Jewish usurer. Bassanio tries to get money from Shylock based on Antonio’s credit. Shylock lends the money to Antonio but he couldn’t pay back his loan within three months. Shylock demands a pound of Antonio’s flesh. Portia (dressed as Balthasar, the legal consultant) repeatedly asks Shylock to show mercy. However Shylock refuses to show any mercy and insists on the pound of flesh. Portia prohibits him from drawing any blood because blood is not mentioned in the contract. Shylock loses his right to the pound of flesh. Portia saves Antonio from the cruel Shylock, and social Justice prevails in the end.