The chief carpenters class in the office of the Nakai was reorganized in the 4th year of the An-ei (1775), and it's formation had been kept until the end of the Edo era. This paper deals with the chief carpenters and their lineages by analyzing the materials of their doctorinerecords "Syumon-aratame-cho" which are provided from the library of the Kyoto University. Major factors that are clarified in this paper are written as following : twenty-one-twenty-three chief carpenters were engaged in their business in the office of Nakai. They were called "Kyoto-toryo", and the two of them who were called "Kashira-toryo" were the representatives in this party. The chief carpenters of the 30 s' and the 40 s' years old were mainly composed of them. They lived near the Nakai office which existed in the north section toward the crossing of the "Teramachi-dori" and the "Marutamachi-dori". A position of the chief carpenter was inherited from the father to his eldest son who had been engaged in working In the Nakai office as "Toryo-minarai". There were twenty-three families of the chief carpenter in the 2th year of the Koka (1845) and most of their lineages as "Toryo-family", from the 4th year of the An-ei to the end of the Edo era.
