PROBLEM TO BE SOLVED: To provide a weeder for a paddy field in which a worker can ride on a working machine and efficiently perform weeding work with less labor.SOLUTION: A weed treatment apparatus for a paddy field is constituted by providing a rod support part 4 at the machine body rear part of a worker riding type working machine 1 traveling in the paddy field while rotating a driving wheel 3 by a power source 2, fixing a pull rod 5 orthogonal to a traveling direction, horizontally to the rod support part 4, and locking wires 7 from which weeding implements 8 hang down, to a large number of wire hanging parts 6 provided at the pull rod 5 at equal spaces that correspond to the rice seedlings of the paddy field. The weeding implement 8 includes (a) rectangular side face plates 9 with the plate surfaces facing in parallel and with a space between the plate surfaces being determined by a rear shaft provided at the rear side center of the plate surfaces, (b) a traction rod 10 made of metal with its center part bent at an acute angle and with both ends connected to both side face plates 9, (c) metal wires 11, 12 stretched in a vertically parallel manner across the upper and lower front ends of the side face plates 9, and (d) a large number of square shape disks 13 of substantially the same diameter, with the disk surface center pivoted at equal spaces to the rear shaft.COPYRIGHT: (C)2013,JPO&INPIT【課題】作業機に搭乗し、少ない労力で効率良く除草作業を行うことが可能となる水田用除草装置を提供する。【解決手段】動力源2で駆動輪3を回転させて水田を走行する作業者搭乗型の作業機1の機体後部に竿支持部4を設け、該竿支持部4に進行方向に直交させた引き竿5を水平に固定し、該引き竿5に水田の稲苗間隔に対応する等間隔で設けた多数のワイヤー吊り部6に除草具8を吊り下げたワイヤー7を係止した水田用雑草処理装置であって、除草具8が、a)板面が平行に対面し、板面間の間隔が板面の後方寄り中央に設けた後部軸で決められた長方形の側面板9と、b)中央部を鋭角に屈曲させ、両端部を前記両側面板9の前端部に接続した金属製の牽引棒10と、c)側面板9の上下前端部に上下平行に張設した金属線材11、12と、d)盤面中心が後部軸に等間隔で多数枢支された略同径の角形円盤13とを備える。【選択図】 図1