Abrogating Ijmaa and abrogated by Ijmaa in Islamic law

This research deals with meaning Ijma' (Consensus), which is one of the main sources of Islamic legislation –sources of Sharia- besides to Holly Book (Quran), Sunnah ( Prophet Muhammad's known traditions and says), and Qiyas (Analogy). İt also deals with meaning of Naskh ( Abrogation) and discusses Ijma' and Naskh as a term presenting some issues that related to them. The research also discusses the possibility of Abrogating –removing- Ijma` by any of the sources of Islamic legislation, or the possibality of removing any of them by Ijma'. İt also shows that Muslim jurists are divided into two groups according to their perspective about abrogating Ijma', or abrogating by it. One group agrees and belives it is possible, and the other disagrees. we mentioned both groups` proofs they provided to support their point of view. We also clarify in which subjects they agreed with each other, and which ones they disagreed. By the end of the research we clarify that the proofs provided by the Muslim jurists who disareed is stronger, and as result we concluded that arogating Ijma' or abrogating by it is uneccaptable and impossible in any way. Keywords: Naskh, Ijma', Book, Sunnah, legislation