In the history of Islamic logic, during the 13th century and after, education-centered, concise logic texts emerged, and the logic tradition, which was formed with commentary and annotation around them, dominated the Islamic world in general. The first of these works, which are widely regarded as a textbook, is undoubtedly the work of al-Abharī (d. 663/1265) the logic booklet, which is famous by the name of Isagoge. For a long time in the Islamic world, both logic education and the method of making selflogic continued mainly through commentary and annotation on the works in question. In this context, one of the most famous commentary chains of Isagoge, the first known Isagoge commentator, Ḥusām al-Qātī (d. 760/1359), and after him, Mullah al-Fanārī’s (d. 834/1431) commentary comes. In this study, the commentarys of consept (tasawwur) made by al-Qātī and al-Fanārī on al-Abharī’s famous work was examined and the similarities and differences between the two commentators were evaluated. First, the definition of logic science was discussed. Later, two commentator’s views on concepts, five universals and definitions were revealed and their similarities and differences were addressed.