PROBLEM TO BE SOLVED BY THE EFFICIENCY OF ROUTING ROOF FROM GROUND.SOLUTION: A hole penetrating the root stock 9 from the upper side to the lower side is drilled, and the side roots 9a of the root stock 9 are cut by digging the ground 8 around the root line, and thereafter pulling up means The root 9 is engaged with the root 9 and the root 9 is withdrawn from the ground 8 in this engaged state.(FIG.【課題】根株を地盤から引き上げる作業を効率化する。【解決手段】根株9に対し上から下に向かって貫通する孔部を穿孔すると共に、根株周囲の地盤8を掘ることにより根株9の側根9aを切断した後、前記孔部を介した引き上げ手段の根株9への係合を行い、この係合状態で根株9を地盤8から引き上げる。【選択図】図1