To provide a piping attaching construction securing the watertightness of a sheathing roof board of a building.

A pipe-shaped body 20 penetrated almost through a central part of a board shaped body is inserted to an insertion hole 13 made in the sheathing roof board 11, and this board shaped body seals the insertion hole 13 in the sheathing roof board 11 in a watertight manner and then fixed to the top of the sheathing roof board 11 and one connection end of a pipe-shaped body 20 is positioned above the roof.