Interpretation defined as revealing the face of the words and sentences of the Quranic verses, has methods including the method of Quran to Quran commentary. In this way, some people do not need to use narrations in the interpretation of verses by claiming the adequacy of the Quran to express their meanings. Among the Shia's commentaries, one claiming its being relied on this method is that of Tasnim. In this commentary, counted as a complement of al-Mizan, the author, separating the narrative part of the commentary section, has tried to use the verses themselves in finding the meanings and intentions of the verses, on this basis, the author has been counted among those believing in sufficiency of the Quran in commentary. A review of the commentary, however, would make it clear that the author may not be regarded as those believing in the Quran`s sufficiency in commentary. The reason lies in the fact that the author in the sections other than those of traditions and remarks, in cases has used traditions also. Such an action may be regarded as a breach of the method. The breach cases often have occurred in finding the extensions and intentions of the ambiguous words.