To provide a construction method for draining ground and its member capable of preventing a drop of water from being penetrated into the ground even when only the ground surface which is formed out of crushed stone and surface soil is wetted, draining and drying the ground more properly in a short time.

The surrounding of a surface-to-be-drained of the ground 1 is dug to form a water channel 3, the center part of the surface of the water channel 3 is raised than the surrounding part, the ground by roller compaction is leveled to make it a substrate 2, the substrate 2 is covered with a plastic corrugated sheet 7 made by protruding rows 18 and recessed rows 19, the crushed stone 8 is layered and covered with surface soil 9, and water penetrated into the ground surface soil 9 due to raining is made to flow into the surrounding water passage 3 through the recessed rows 19 of the plastic corrugated sheet 7 for draining.