To provide a planting/seeding machine with a simplified configuration when a ground preparation device for preparing a ground surface of rice field is provided.SOLUTION: A work device 5 is supported to a link mechanism 3 connected to a rear part of a machine body in a vertically swinging manner, and a ground preparation device 53 is provided between the machine body and the work device 5 and is supported so as to be lifted and lowered from/to the work device 5 via a lifting mechanism 81, 83. An electric actuator 56 can freely drive the ground preparation device 53 so as to be lifted and lowered from/to a work position in which the device is in contact with the ground surface of rice field for ground preparation and a non-work position in which the device is upwardly lifted apart from the ground surface. A work operation part 120 for operating the electric actuator 56 is mounted on the work device 5 so as to lift and lower the ground preparation device 53 from/to the work position and non-work position by a human operation.SELECTED DRAWING: Figure 5【課題】植播系作業機において、田面を整地する整地装置を備えた場合、構造の簡素化を図る。【解決手段】機体の後部に上下揺動自在に連結されたリンク機構３に作業装置５が支持され、整地装置５３が、機体と作業装置５との間に位置するように、昇降機構８１，８３を介して作業装置５に昇降自在に支持される。電動アクチュエータ５６により、整地装置５３を、田面に接地して田面を整地する作業位置、及び、田面から上側に離れた非作業位置に昇降駆動自在である。人為的に操作されることにより、整地装置５３が作業位置及び非作業位置に昇降するように、電動アクチュエータ５６を作動させる作動操作部１２０が、作業装置５に取り付けられている。【選択図】図５
