PURPOSE: To make it possible to convey grain to a desired place with units in which a spiral conveyor is disposed in a conveying cylinder, being suitably connected, by providing an L-shape connecting cylinder which is arranged similarly to the unit.

CONSTITUTION: A cylindrical linear conveying cylinder 1 is formed at its both ends with flanges 2, 3 bent outward at a right angle. A sprial conveyor 4 and a rotary shaft 5 therefor are disposed in the conveying cylinder 1. The spiral conveyor 4 and the rotary shaft 5 are longer than the conveying cylinder 1 so that both ends of them are projected from the cylinder 1. Further, in an L-shape connecting pipe 6 to be connected to the conveying cylinder 1, a horizontal shaft cylinder 7 in which the rotary shaft 5 is journalled, is attached to a vertical shaft 8. Accordingly, only by connecting the units one by one, the gains may be transferred to a desired place.