To transfer long vegetables one by one without being entangled mutually even when a lot of long vegetables are loaded at a time, by providing a level difference between belt conveyors by turns and driving the downstream converors faster than the upstream conveyors in a multistage conveyor system.

The first belt conveyor 3 provided with a plurality of projections 32 with a larger pitch than the diameter of long vegetables A and a breadthwise long span, on the surface of the belt conveyor and the second belt conveyor 4 provided with projections 42 and a level difference against the first belt conveyor and driven faster than the first belt conveyor. And in the same way, the third belt conveyor 5 is arranged following the second belt conveyor 4 to constitute a transfer system. In this way, when lord vegetables A supplied to the first belt conveyor 3 in a piled and entangled condition, are transferred to the next conveyor, the piled and entangled condition is gradually eased and they are arrayed in order to be arranged one by one at every pitch and mounted on an introduction conveyor 6.