Potteries, dating from the 5th century BC to the 15-16 centuries AD were found during the excavations in the South Stoa of the Sanctuary of Artemis at Magnesia on the Meander. Among these potteries, the Eastern Sigillata ware constitutes the largest group. 161 pieces of the pottery found in the South Stoa belong to the Eastern Sigillata, and 160 pieces of them belong to the Eastern Sigillata B. In this study, 29 potteries belonging to the East Sigillata B found in the South Stoa are discussed. The pottery found in the South Stoa has been examined under two subtitles as ESB-I and ESB-II. As a result of the analogy, five forms included in ESB-I was determined. Hayes Form 22, evaluated in the ESB-I group, belongs to the end of the 1st century BC and the first quarter of the 1st century AD and was identified as the earliest example. Other ESB-I examples such as “Hayes Form 7, 19, 26 and 29” are dated to the first half and middle of the 1st century AD. In the group evaluated in ESB-II, there are seven different forms consisting of plates, bowls and double handled bowls. The earliest example of this group, Hayes Form 58, was dated to the second half of the 1st century AD, while the late versions of Hayes Form 60 and 70, the latest examples of this group, were dated to the second half of the 2nd century AD and the first half of the 3rd century AD. As a result of the evaluation of the ESB found in the South Stoa dated to the Early Imperial Period according to the architectural decoration features, it was understood that the architecture of the building and its findings were compatible. Especially in the light of ESB, which are densely found in the South Stoa of the Sanctuary of Artemis and other areas of the city, it was concluded that Magnesia on the Meander had strong relations with cities such as Tralleis and Ephesos, which were proposed as ESB production centers, and that the production of ESB continued at least until the middle of the 3rd century AD.