PROBLEM TO BE SOLVED: To provide an auxiliary wheel which can be attached and detached according to a use situation while eliminating waste of parts. A paddy work machine includes a drive axle 16 to which power from a prime mover is transmitted, left and right wheels supported at both ends of the drive axle 16, and a side of the wheel opposite to a side supported by the drive axle 16. The auxiliary wheel attachment member 30 is detachably attached to the auxiliary wheel attachment member 30 and the auxiliary wheel attachment is detachably attached to the auxiliary wheel attachment member 30. [Selection diagram] Fig. 5【課題】部品の無駄をなくしながら、使用状況に応じて着脱が可能な補助車輪が要望されている。【解決手段】水田作業機は、原動機からの動力が伝達される駆動車軸１６と、駆動車軸１６の両端に支持される左右の車輪と、車輪の、駆動車軸１６に支持される側と反対側に着脱可能に装着される補助車輪取付部材３０と、補助車輪取付部材３０に着脱可能に装着される補助車輪とを備える。【選択図】図５
