Undoubtedly, the genitive is one of the noun signs which separates it from two other kinds of words: verb and letter. And the genitive joins the noun by one of the two agents-preposition particles and annxation. As a result’ the postfixed must be an explicit noun or a sentence that chenges to a noun by following one of the infinitival particles’ and the postfixed never could be a sentence. Never thelees, the Arabic syntactic allocated it a part of the anexation chapte. This has been done without any mention of the above mentioned difficulty.