To provide a farm product-serially feeding device capable of precisely and efficiently sending out the farm product such as onion charged in one lump one by one.

This farm product-serially feeding device has a pair of side wall parts 4a and 4b arranged in the right and left sides, a bottom plate part 5 installed between the pair of the side wall parts 4a and 4b and formed into a front-lowered state, and a conveying part 6 arranged so as to direct upward from the vicinity of the front end of the bottom plate part 5, and regulated so that many materials (w) to be treated, charged onto the bottom plate part 5 may be scooped up one by one in order and may be dropped in front of the conveying part 6. The rear part of the bottom plate part 5 is supported through a right and left-directed shaft 10 so as to be swung in the vertical direction, and an oscillating cam 20 is fixed to a right and left-directed rotary shaft 15 for carrying out the conveying action of the conveying part 6. The oscillation displacement of the oscillating cam 20 is transmitted to the bottom plate part 5, and a cooperative supporting structure 21 for supporting the front part of the bottom plate part 5 is formed.