PROBLEM TO BE SOLVED: To provide a seeder capable of achieving uniform dissemination on bed soil while permitting an increase or decrease of an amount dissemination per nursery box in a wider range.SOLUTION: A seeder comprises: a transport device (R) for transporting a nursery box (T) in one direction； and a dissemination device (D) provided on a transport path of the transport device (R). The dissemination device (D) comprises: a seed hopper (31) for containing seeds； and a columnar dissemination delivery rolls (32) which are attached to a lower side of the seed hopper (31) so as to be driven to rotate, and which have on a peripheral surface thereof, a plurality of delivery recesses at a prescribed interval. The seeder is configured to rotationally drive the dissemination delivery rolls (32), deliver the seeds contained in the seed hopper (31) from the delivery recesses and fall the seeds on bed soil in the nursery box (T) to perform dissemination. A plurality of dissemination delivery rolls (32) are provided and are configured so that they have different amounts of seed delivery per unit time at a prescribed rotary speed.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】１枚の育苗箱当たりの播種量をより広い範囲で増減可能としながら床土上への均一な播種を実現できる播種機を提供する。【解決手段】一方向に育苗箱（Ｔ）を搬送する搬送装置（Ｒ）と、搬送装置（Ｒ）の搬送経路上に設けられた播種装置（Ｄ）を備え、播種装置（Ｄ）は、種子を貯留する種子ホッパ（３１）と、種子ホッパ（３１）の下方に回転駆動自在に装着され、周面に繰出凹部が所定間隔毎に複数設けられた円柱状の播種繰出ロール（３２）とを備えており、播種繰出ロール（３２）を回転駆動し、種子ホッパ（３１）に貯留された種子を繰出凹部から繰出して、育苗箱（Ｔ）内の床土に落下させて播種を行う播種機であって、播種繰出ロール（３２）は、複数設けられ、かつ、所定の回転速度における単位時間当たりの種子の繰出量がそれぞれ異なるように構成することにより、上記課題の解決が図られる。【選択図】 図１
