PROBLEM TO BE SOLVED: To provide a sowing device that can smoothly respond to different types of multiple seedling trays, and can perform seeding work quickly and accurately.SOLUTION: A sowing device 1 comprises a suction board unit 2, a seed guide unit 3, a tray receiving base 4 and a lifting/lowering mechanism 5. Seed is aligned and held by the suction board unit 2, and is guided to the seedling tray T on the tray receiving base 4 through the seed guide unit 3. The tray T has many types with different cell arrays. The seed guide unit 3 is removable on a frame 6, and can be replaced to the unit adapting to another specific seedling tray T. The suction board unit 4 comprises a suction board body 11, a suction plate 12, a support plate 13, a clamping frame 14 and a snap lock 15. The snap lock 15 is opened up, and the suction plate 12 and the support plate 13 can be replaced to the plates adapting to the other specific seedling tray T.SELECTED DRAWING: Figure 1