Isnad is not only a means of transmission of hadith narrations but also the transmission of knowledge between strata or within the same stratum. This transfer of knowledge, i.e., using sened, leads to forming horizontal and vertical networks. In this context, the isnad network can provide important clues to follow the circulation of knowledge and social relations between periods and regions. Since they have a versatile profile, especially the isnad networks of the scholars of the tabiin period, hadith, tafsir, fiqh, etc., areas will be more comprehensive. In this context, in our study, which aims to describe the narration style of the period by comparing the narrations and isnad networks in different fields, the narrations and isnad network of Qatāda b. Diāma, one of the tabiin scholars, was analyzed through his narrations in the works attributed to him. For this purpose, the sciences of tafsīr, fiqh, and hadīth were chosen for Qatāda's areas of authority, considering the volume of the article and the accessibility of the sources. By comparing his narrations in the fields of tafsīr and fiqh, their authentication, sened analysis, and prevalence within their respective fields, his muhaddith aspect was also examined. Considering the text's flow and the study's volume, the analysis of the narrations has been limited to footnotes. The works attributed to Qatāda ibn Diāma, al-Manāsik and al-Nasih wa'l-Mensūh, constitute our primary sources, but early and classical hadīth, tafsīr and fiqh sources have been utilized. For the sake of limitation, the Musnad of Abū Hanīfah and Imam Shāfi'ī, the Asār of Imam Abū Yūsuf and Imam Muhammad, al-Ṣāḥawī's Sharḥ Meān al-asār, alBayhaqī's Ma'rifat al-Sunan, and the commentaries of al-Tabari and al-Qurtubi are used as sources. The article is organized under two main headings. In the first main heading, Qatāda b. Diāma's life and isnad network are discussed; the results obtained by evaluating his areas of authority and narrations are presented in the second main heading. Studies have been carried out on subjects such as Qatāda's hadith, exegesis, and jurisprudence. The present study, on the other hand, aims to deal with Qatāda's authority areas in the context of the isnād network and to reveal the results from a holistic point of view. However, it is difficult to say that Qatāda's isnād network has been fully shown and analyzed because not all of his narrations in the fields of tafsīr and fiqh and his narrations in other fields of science other than these fields could be included in the scope of the article and due to the limitations of the sources compared. However, since such a study would exceed the usual limits of an academic article, the present study can be considered as a nucleus. According to the results obtained, the isnad network extends from the Companions to the third century. However, it is wider in the layer of the followers, both due to the breadth of their authority and the fact that they are among the younger tâbiîn. It can be said that this widespread network, which is like the channels that led him to the Companions, manifested itself in his narrations in the form of mursals. One of the main criticisms against him, deceit, as seen in the narration style of the period, is not narrating the hadith that he did not hear from himself as if he had heard it from his teacher, but in the form of incompleteness in not mentioning the name of a narrator in his own stratum. It can also be stated here that he used isnad in the narration of hadith; however, as a result of the narration style of the period, he did not have a special sensitivity in the use of mursal-unbroken (muttasıl) narrators. Therefore, in this sense, his use of deceit should not be considered a flaw when evaluated within the narration style of the period. When an evaluation is made between the fields of authority, the isnad network is concentrated in the field of tafsir. When his narrations are analyzed in terms of tafsīr and fiqh sciences, more mursal narrations are found in fiqh narrations than in tafsīr. These narrations are mostly based on famous Mursil narrators who were his teachers. However, it can be said that tafsīr narrations are not subjected to deceit, whereas fiqh narrations are subjected to tadlis. When we look at the distribution among regions, it is seen that the isnad network is distributed in Iraq, Damascus, and Hijaz regions, with Basra predominating. [ABSTRACT FROM AUTHOR]