PROBLEM TO BE SOLVED: To provide an agricultural work machine that enables the front/rear and right/left free weight balance of the work machine according to different contents of work such as tillage work and road travel.SOLUTION: An agricultural work machine includes: pivotal support pats 3, 4 in right/left side parts 1a, 1b of a machine body 1 weights 7, 8 arranged in the pivotal support parts 3, 4 through support bodies 5, 6, capable of moving weight on the front/rear side in the machine body 1 and restoring right/left inclination of the machine body 1, pivotally supported so as to rotate generally in parallel to a lateral shaft of the machine body, and attached with a weight positioning mechanism 9 fixing the rotation at an arbitrary position. The weight positioning mechanism 9 includes: slide faces formed in the pivotal support parts 3, 4 while facing vertically separately on a pivotal support shaft side of the machine body 1 and a pivotal support hole side of the support bodies 5, 6 axially receiving the pivotal support shaft and a fastening part causing both slide faces to pressure-contact each other. The fastening part is used to fasten both slide faces to enable fixation.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】耕耘作業や道路走行等、異なった作業の内容に応じた作業機のウエイトバランスを前後左右に自在に取ることが可能となる農業用作業機を提供する。【解決手段】機体1の左右の側部1a、1bに枢支部3、4を備え、該枢支部3、4に支持体5、6を介して、機体1の前後への荷重の移動と機体1の左右への傾きの立て直しとを可能とするウエイト7、8を機体の横軸と略平行に回動自在に枢支すると共にその回動を任意の位置に固定するウエイト位置決め機構9を付設し、該ウエイト位置決め機構9は、枢支部3、4に、機体1の枢支軸側と該枢支軸を軸受けする支持体5、6の枢支孔側とに別れて上下対面する摺動面を形成すると共に両摺動面を圧接させる締付け部を備え、該締付け部で両摺動面を締付けることで固定可能とする。【選択図】 図1