PROBLEM TO BE SOLVED: To provide a seeding machine for a nursery box, the machine including a drive assist rail that is simple in assembling and mounting.SOLUTION: A seeding machine for a nursery box includes a bed soil supply device for putting bed soil in the nursery box, a watering device for watering it from a bed soil upper surface after passing the bed soil supply device, a seeding device for seeding a paddy-rice seed rice of a predetermined amount on the bed soil after passing the watering device, and a soil covering device for dropping a predetermined amount of soil covering from an upper surface after passing the seeding device, on a drive rail for conveyance. In the seeding machine for nursery box, a drive assist rail can continuously be arranged on a drive rail for conveying the nursery box. A power transmission part for transmitting the rotational power from the drive rail to the drive assist rail while continuously arranging a drive assist rail on the drive rail is configured by the engagement between a drive side gear-wheel provided in the drive rail side and a driven side gear-wheel provided in the side of the drive assist rail.SELECTED DRAWING: Figure 7【課題】組み立て、取り付けが簡単な駆動補助レールを備えた育苗箱用播種機を提供する。【解決手段】搬送用の駆動レール上に、育苗箱に床土を入れる床土供給装置と、該床土供給装置を通過後に床土上面から灌水する灌水装置と、該灌水装置を通過後に床土上に規定量の水稲種もみを播種する播種装置と、該播種装置を通過後に上面から規定量の覆土を落とす覆土装置を配置し、育苗箱搬送用の駆動レールに駆動補助レールを連設可能とした育苗箱用播種機において、該駆動レールに駆動補助レールを連設した状態で、該駆動レールから駆動補助レールへ回転動力を伝える動力伝達部を、該駆動レール側に設けた駆動側歯車と、該駆動補助レールの側に設けた従動側歯車との噛合により行う構成とした。【選択図】図７
