PROBLEM TO BE SOLVED: To provide a paddy work machine in which a state where lubricant circulation can be performed between a front transmission case and a rear transmission case in an advantageous condition as described above and a state where installation of a rotation number sensor is possible can be provided advantageously in manufacture of the rear transmission case.SOLUTION: Circulation pipe conduits 45 and 46 that circulate lubricant between a front transmission case 21 and a rear transmission case 30 are connected across the front transmission case 21 and the rear transmission case 30. Penetration holes 47 that communicate the circulation pipe conduits 45 and 46 with the inside of the rear transmission case 30, and installation holes 51 for installing rotation number sensors 50 which detect rotation number of a rotating member constituting a rear wheel transmission mechanism in the rear transmission case 30, are provided parallel in the rear transmission case 30, while being opened toward the front of the machine.COPYRIGHT: (C)2015,JPO&INPIT【課題】前伝動ケースと後伝動ケースとの間での潤滑油循環を上記した如く有利な状態で行わせることができる状態、かつ、回転数センサーの取付けが可能な状態を後伝動ケースの製作面で有利に備えさせられる水田作業機を提供する。【解決手段】前伝動ケース21と後伝動ケース30とにわたり、前伝動ケース21と後伝動ケース30との間で潤滑油を循環させる循環管路45,46を接続してある。循環管路45,46を後伝動ケース30の内部に連通させる貫通孔47、及び、後輪伝動機構を構成する回転部材の回転数を検出する回転数センサー50を後伝動ケース30に装着する為の取付孔51を、後伝動ケース30に機体前方向きに開口する状態で平行に設けてある。【選択図】図3
