The book Tafsīr al-Imam al-Hasan al-'Askari (as) is a commentary (Tafsīr) attributed to the Eleventh Imam of the Shi'a, Imam Hasan al-'Askari (as). This book contains unique interpretive, theological, and doctrinal contents, and some of its narrations are found in the four principal Shi'a hadith collections (al-Kutub al-Arba'ah), such as Man La Yahduruhu al-Faqih; therefore, examining its authenticity is of particular importance. There is a difference of opinion among the Shi'a regarding the authenticity of the book. This paper examines the acceptance or rejection of the narrations in this book by reviewing both confirming and refuting evidence. Ultimately, based on confirming evidence—such as the narration and verification (taṣḥīḥ) of the book by Shaykh Saduq and other early Shi'a scholars—and the refutation of the opposing evidence—such as the three-pronged rejection of the Rijāl attributed to Ibn al-Ghada'iri (the weaknesses of its manuscript, author, and content) and the rejection of excessive perceived exaggeration (ghuluw)—this study concludes that the narrations of this Tafsīr cannot be definitively rejected and are almost universally accepted. The research methodology is descriptive-analytical, and data was collected via library research.