The Council of Indonesian Muslim Associations Party, better known as the Masyumi Party, was a major Islamic political party in Indonesia during the Liberal Democracy Era in Indonesia. It was banned in 1960 by President Sukarno for supporting the PRRI rebellion.

The Liberal Democracy period in Indonesia, also known as the Era of Parliamentary Democracy, was a period in Indonesian political history, when the country was under a liberal democratic system. During this period, Indonesia held its first and only free and fair legislative election until 1999, but also saw continual political instability. The period began on 17 August 1950 following the dissolution of the federal United States of Indonesia, less than a year after its formation, and ended with the imposition of martial law and President Sukarno's decree, which resulted in the introduction of the Guided Democracy period on 5 July 1959.