PROBLEM TO BE SOLVED: To provide a ridge skirt plowing body, a weeder and a herbicidal method, capable of performing a weeding work of a ridge skirt without breaking a mulch sheet used in a mulching culture method, and capable of reducing physical burden on a worker.SOLUTION: A weeder A includes a control machine 1 and a ridge skirt plowing body 2 mounted in the traveling direction of the control machine 1. The ridge skirt plowing body 2 has an attachment base part 21 used as an attachment part to the control machine 1 through an attachment rod 151, a rotor 23 attached rotatably to the attachment base part 21, a tension coil spring 25 for imparting energization force to the rotor 23, and a height holding part 26 arranged under the attachment base part 21.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】マルチ栽培法で用いられるマルチシートを破損させることなく畝裾の除草作業を行うことができると共に、作業者の肉体的負担を軽減する畝裾耕起体、除草装置及び除草方法を提供する。【解決手段】除草装置Aは、管理機1と、管理機1の進行方向に取り付けられた畝裾耕起体2を備えている。畝裾耕起体2は、取付棒151を介して管理機1への取り付け部分となる取付基部21と、取付基部21に回動可能に取り付けられた回動体23と、回動体23に付勢力を与える引っ張りコイルバネ25と、取付基部21下方に配置された高さ保持部26とを有する。【選択図】図1