To automatically stack up bulk material uniformly in height and efficiently when the bulk material is stacked up in a silo.

In this silo stacking-up device, a stacking conveyor 15 connected with an ground unloading conveyor 11, and a ceiling running stacking machine 18, are provided at the upper part of a silo, the ground unloading conveyor 11 is provided with a conveyor weighing equipment 12 detecting the carrying load of bulk material, and concurrently a stacking control device 13 is provided, which controls every stacking point the volume of the bulk material stacked up by the ceiling running stacking machine 18 based on a plurality of stacking points set in advance, the volume of the bulk material required to be stacked up at the respective stacking points, and the carrying load measured by the conveyor weighing equipment 12.