This study reviewed critically the book of subconscious mind in Quran written by Ayatollah Alireza A'rafi. Employing an interrogative research method, the author studied some verses of the Qur'an with the aim of discovering the Qur'anic theory of the subconscious mind, as defined by Freud. Despite its methodological and content strengths, this work can be criticized in its basic and methodological dimensions. The present study is organized in two parts. In the first part, the most important contents of the book are briefly reviewed and in the second part, the strengths and weaknesses of the work are investigated through an analytical method. The research findings showed that, firstly, the author has not considered all the possibilities in interpreting the verses. Secondly, in the analysis of some verses, the context of the surah and verses has not been seriously considered; therefore, a clear meaning has not been obtained for the verses. Third, the author's critique of the various dimensions of Freud's theory has methodological, fundamental, and substantive flaws.