To provide the structure of a pile with a rotary press-in type blade capable of increasing pile bearing power.

The outer peripheral part of a pile body 6 is provided with the blade 5 projected to the side, and a lower face part 7 of the blade 5 is formed into a rugged face part for suppressing or regulating the diffusion of sediment 8 outward in a radial line direction over the outer peripheral position of the blade 5.