If the biographical works regarding hadith narrators are glanced, it will be seen that the criticisms about many narrators have been conditioned in sorne ways such as period,place, teaeber (sheikh), student (rawi), subject, and terrns of narration, and whether having been narrated from original book or by heart. These criticisms are sametimes confinedto one or a few certain narrations of some narrators. This fact rnust be accepted understandable to a certain extent, for the humankinci is the elemental part of the isnad sistem,which constitutes the backbone of narrating. Since humankinci is naturally prone to change in the force of reason, and the narrators and their works may undergo sorne negativeeffects, it may be to! d that it is very hard or ev en irnpossible to find any narrator who has never been criticised although he has been we!l-qualifited in general. Therefore, it isnecessary to dassify these criticisms as unconditioned and conditioned, as well as they are dassified as unexplained (mujrnal) and explained (mufassar). Here, in this artide we try to study the conditioned criticisms and explain its results inpractice with examples.