This paper is on tetsudai and Bakufu crew on the reconstruction of the Edo castle in the early days of the 18th century. The sense of this paper is as follows ; 1. This paper treats of the 18th century, which is rarely treated of in the former papers. 2. This paper treats of tetsudai, especially the relationship between tetsudai and Bakufu crew. 3. This paper treats of Bakufu crew, especially the relationship between Sakujikata, Kobushinkata and Fushinkata, which I myself have treated of several times in my former papers.