The Prosperous Justice Party (Indonesian: Partai Keadilan Sejahtera, sometimes called the Justice and Prosperity Party), frequently abbreviated to PKS, is an Islamist political party in Indonesia.

PKS is a metamorphosis from the Justice Party (Indonesian: Partai Keadilan, PK) established in 1998. The party was originally influenced by the Muslim Brotherhood movement of Egypt, and considered as Islamist party for its calls for Islam to play a central role in public life. Today it is considered a nationalist Islamist party that conforms with Pancasila doctrine and no longer upholds sharia as a main goal.

