ABSTRACT
This research aims to uncover the consensus (ijma’) in the juristic thought of Judge Abdul-Jabbar Al-Mu’tazili ،the leading figure of Mu’tazilite theol-ogy in his time ،and the author of the book “Al-Umdah ،“ considered one of the pillars of the science of Usul al-Fiqh (Principles of Islamic Jurispru-dence). The researchers addressed various issues related to consensus ،such as how the judge derives the authority of consensus ،who acknowledges their consensus ،the consensus of believers in every era as an argument ،the ruling on consensus when one or two disagree ،methods of identifying consensus، differences among the companions in a matter with two opinions ،the ruling on introducing a third opinion ،consensus occurring after a dispute ،consen-sus of the people.
