Research on ‘reading of holy Quran’ demonstrates that the issue of ‘conjunction’ in Arabic language effects on appearance of readers’ disagreements from two aspects. First, flexibility of some words in conjunction to previous words, leads to disagreement on specification of function (Ir?b). On the other hand, in spite of agreements on being subordinate in conjunction of one word, sometimes readers disagree in recognition of the primary word in conjunction which leads to two different function (Ir?b) due to different reading of conjunct word. This essay attempts to discover recurring patterns of reading disagreement affected by the issue of words conjunction. The method of this article is reference to disagreements between Quran readers and the result is clarification of conjunction’s role in appearance of different readings.