[PROBLEMS] To provide a root removal blade unit specialized in root removal work consisting of two operations of root cutting and root excavation, and a root removal attachment using the same. Two blade plates 31 of the same shape, which are erected in a face-to-face manner at a predetermined interval from the base 2, are joined by surface joining at the tips, and are formed on all or part of the edges on the excavation side of each blade plate. A plurality of sharp corners 33 are formed. The surface shape of the blade plate is sharp at the tip and the edge opposite to the excavation side is formed in a convex curve toward the tip, and furthermore, the center of the mounting side to the base and the center of the tip of the blade plate are It is configured with offset. The root removal attachment 1 is configured such that a plurality of blade units 3 are mounted on a base configured to be attached to the distal end of an arm of a hydraulic shovel, with edges on the digging side of each blade plate facing in the same direction, and The blade plates are configured so that the surface sides face each other. [Selection diagram] Fig. 1【課題】根切りと根の掘り起しの２つの作業から成る除根作業に特化した除根用刃ユニット及びこれを用いた除根用アタッチメントを提供する【解決手段】除根用刃ユニット３は、基台２から所定間隔をもって対面状に立設させた同形２枚の刃板３１を先端部で面接合して成り、かつ各刃板の掘削側となる縁辺の全部又は先端部を含む一部に鋭利状の角部３３を複数個形成して構成する。刃板の面形状は、先端鋭角とすると共に掘削側と反対側の縁辺を先端部に向かって凸曲線状に形成し、さらには基台への取付け辺の中心と、刃板の先端中心をオフセットさせて構成する。除根用アタッチメント１は、油圧ショベルのアームの先端部に装着可能に構成した基台に、刃ユニット３の複数個を、各刃板の掘削側となる縁辺を同方向に向けた状態で、かつ刃板の面側どうしを対向した状態で構成する。【選択図】図１
