Jitchu was a famous monk who played an active part in Todai-ji from the late Nara period to the early Heian period. Among his various activities, this study aims to clarify the actual situation of his construction works. In this paper it is revealed that Jitchu played several roles in the construction for not only the management but also planning and site working. This shows that he had broad and respective relations with those who concerning in the construction processes, especially he was linked closely to the Empress Shotoku in several cases.