To adjust deviation of a conveying-out end of a landing conveyor projected from a ship's hull fitted to a central position of a conveying-in hopper arranged on a wharf when landing bulk from a bulk carrying vessel by a self-unloading system.

In the conveying-out position adjustment system for the landing conveyor, the landing conveyor 3 is a shuttle conveyor. The system includes a landing conveyor expansion/contraction device 10 having: an expansion/contraction direction position sensor 8 for measuring a distance with the conveying-in hopper 6 provided on the conveying-out end 31 of the landing conveyor 3; and a control device 9 for expanding/contracting the landing conveyor by controlling the expansion/contraction mechanism 33 of the landing conveyor 3 by a measurement signal from the expansion direction position sensor 8.

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