This paper is about the characteristics of the supply of wood in the 17th and 18th centuries of Sannung construction. The construction period of the Sannung construction cannot be planned and determined, and the construction must be completed within 3 months. Due to these characteristics, the supply of wood is also different from that of general construction. First, the method of directly logging and obtaining was minimized. Instead, they received timber from a private timber dealer. In the case of logging, considering transportation, it did not leave Hwanghae-do, Gangwon-do, and Chungcheong-do, where the distance was as close as possible. In addition, wood stored by individuals or the government was used as much as possible rather than logging, and in the 18th century, there were many cases of logging around royal tombs.