PURPOSE: To simplify the structure and improve the rigidity of two grain lifters in the captioned device in which both are separately erected in parallel by placing a grain receiving box body in between both grain lifters while being vertically mountably/removably and fixably connected to both grain lifters.

CONSTITUTION: Grain lifters 9, 30 are erected right and left leaving a space and a grain receiving box body 48 for feeding grains from the grain lifter 9 to a rotary selecting cylinder is provided on the upper part sides of both grain lifters 9, 30. In this case, guide members 50W53 each of which are formed by bending hook parts 49 are provided on each upper part right and left of both grain lifters 9, 30, and both side end edges of the grain receiving box 48 are fitted into between the guide members 51, 52 from the upper part and the grain receiving box 48 is installed and fixed with bolts 63 and nuts 65, connecting both grain lifters 9, 30. Due to this structure, the supporting rigidity of the right and left grain lifters can be improved.