This study includes an analytical study of the term "Qiyās al-Adna” among the Scholars of Uṣūl al-Fiqh. It is known that the Qiyās is divided into the following types: an analogy of higher order (Qiyās al-Awla), an analogy of an equivalent order (Qiyās al-Musawi), an analogy of a lower order (Qiyās al-Adna). However, Qiyās al-Adna raised issues and objections among some scholars, in past and present; hence, there is an urgent need to present a comprehensive study that shows the (...) meaning of Qiyās al-Adna for those who advocate it, discusses the objections and issues that have been raised about it, and clarifies its connection to other Qiyās types. Moreover, the study will concern the applied side of Qiyās al-Adna by explaining how jurists used it. The researcher used the analytical method and referred to the most important, ancient and modern Uṣūl al-Fiqh sources and references. The study concluded with results, the most prominent of which is that the Qiyās al-Adna has two meaning: the first is that in which the original case is more deserving of legal ruling than the new or parallel case, so the new case is considered as a lower order, and the second is that the effective cause in the new case is weaker than in the original case. Among the results of the study is that the objections directed to the Qiyās al-Adna are weak, and that it is not limited to the presumptive Qiyās on the most correct opinion, also, that the jurists used the term Qiyās al-Adna in the second meaning, which says that the lower order is in its effective cause, not the legal ruling. (shrink)