The present invention is rotated by the rotation of the drive motor, the first guide and the second guide provided in the rotating body is rotated and the gripping plate coupled to the first guide and the second guide is rotated along an even rotation radius As the seedling box positioned at the bottom of the seedling boxes stacked by one is dropped one by one to the transport frame side and supplied to the seeding machine side, the seedling box can be automatically supplied, so that the seedling seeding operation can be made more easily. It is possible to solve the problems caused by pushing the seedling box transfer, and to provide a seedling box feeder does not burden the purchase cost of the farm by a simple configuration. To this end, the present invention is provided on the upper side of the feed frame (3) provided with a seeding machine (1) for sowing seedlings to the seedling box to be supplied on the upper side and a feed roller (2) to which the seedling box is transported. What is claimed is: 1. A seedling box feeder for supplying a stacked seedling box to a conveying frame (3), the box supporting frame (10) vertically placed on both upper sides of the conveying frame (3)； A seedling box 20 positioned inside the box support frame 10 and configured to stack a plurality； The lower seedling boxes 20a of the seedling boxes 20 stacked on the lower sides of the box support frame 10 and laminated on the box support frame 10 are dropped on the upper portion of the transfer frame 3. A guide body 30 is formed to ride the feed roller 2 of the transfer frame 3 so that the seedling box is supplied to the planter 1 side. The guide body 30 includes two support brackets 31 and 31 installed vertically to the upper side of the transfer frame 3； A rotating shaft 321 having both sides coupled to the two supporting brackets 31 and 31 and a rotating body 32 positioned inside the two supporting brackets 31 and 31 by the rotating shaft 321； An interlocking pulley (33) coupled to
