To provide a paddy field implement capable of preventing an agricultural material from being scattered to an unintended direction even when a travel direction of a machine body is switched between a forward movement direction and a backing direction.SOLUTION: Motive force output from a speed changer 24 is branched in a parallel state to a travel transmission system and a work transmission system at a branch part D, motive force of the travel transmission system is transmitted to travel wheels 1, 2, motive force of the work transmission system is transmitted to a work device 5 through a stepless speed changer 45, and a motive force adjustment mechanism 67 capable of adjusting motive force transmitted from the speed changer 24 to the work transmission system is provided closer to the work transmission system side than to the branch part D. By an operation of the motive force adjustment mechanism 67, when the motive force output from the speed changer 24 is forward movement motive force for driving the travel wheels 1, 2 to move forward, the forward movement motive force is transmitted to the work device 5, and when the motive force output from the speed changer 24 is backing motive force for driving the travel wheels 1, 2 to back, the backing motive force is not transmitted to the work device 5.SELECTED DRAWING: Figure 5【課題】水田作業機において、機体の走行方向を前進及び後進に切り替えても、農用資材が意図しない方向に飛ばされることのないようにする。【解決手段】変速装置２４から出力される動力が分岐部Ｄで走行伝動系及び作業伝動系に並列的に分岐されて、走行伝動系の動力が走行用の車輪１，２に伝達され、作業伝動系の動力が無段変速装置４５を通って作業装置５に伝達され、分岐部Ｄよりも作業伝動系側で、変速装置２４から作業伝動系に伝達される動力を調節できる動力調節機構６７が設けられ、動力調節機構６７の動作により、変速装置２４から出力される動力が走行用の車輪１，２を前進駆動させる前進動力である場合には当該前進動力を作業装置５に伝達し、変速装置２４から出力される動力が走行用の車輪１，２を後進駆動させる後進動力である場合には当該後進動力を作業装置５に伝達しない。【選択図】図５
