One of the most important prerequisites for Quranic Tafsir is the recognition of Tafsir rules based on mental, narrative or rational foundations, according to which the Tafsir rules are assessable and systematic and Tafsir errors are also decreased. This book is to meet this need and encompasses 47 Tafsir rules, based on which the rationale of the intellect in understanding the texts and rational and narrative reasons are explained. In this book, five steps of the Tafsir process are explained, according to which the Tafsir rules are categorized; therefore, the book is outlined in seven chapters. The first chapter covers the preliminary discussions, the second to sixth chapters cover the Tafsir rules specific to each step, and the seventh chapter addresses the rules that apply to all the Tafsir steps.