The phenomenon of exaggeration and exaggerators as a serious and destructive danger has threatened to obliterate or distort _he body and substance of divinity. Therefore those studying on authorities have always known the narrators of Imams (PBUH) companions and revealed the faith superstition and especially the technique of exaggerators and
those of which accused of exaggeration.
This writing tries to explain the view of Ahmad ibn Ali Najashi (450) the famous Shiite Rijal scientist of exaggeration and those of
which accused of exaggeration in the Rijal science of Najashi. Recognizing the criteria and the measure of his effectiveness resulted from the great men in weakening or strengthening tr _m we have studied and evaluated.
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