PROBLEM TO BE SOLVED: To prevent a flange part of a rear end of a first seedling tray from coming into contact with a flange part of a front end of a second seedling tray.SOLUTION: A vertical conveying device 30 conveys a seedling tray 20 from a tray loading platform 21 to a transplanting part 3. The vertical conveying device 30 comprises: right and left driving sprockets 34 right and left driven wheels 35 right and left endless chains 40 wound between the driving sprockets 34 and the driven wheels 35 a plurality of vertical feeding members 45, 45,,, attached to the left and right endless chains 40 a bottom plate 26 for supporting and guiding a bottom part of the seedling tray 20 between the right and left endless chains 40 and side part guide members 50 for guiding both right and left sides of the seedling tray 20. A passage space S is formed so that the vertical feeding members 45 pass between a start end of the bottom plate 26 and a terminal end of the tray loading platform 21. A step part 26c lowered by one step is formed on the start end side of the bottom plate 26.SELECTED DRAWING: Figure 5
