To provide a support system for accurately performing work of sequentially loading cargo delivered to a loading work area onto a vehicle.

A calculating means 1 is used calculating a loading height of the cargo loaded at equal heights using the whole face of a loading space of the delivery vehicle by inputting a total number of the cargo to be loaded on one delivery vehicle and sizes of each cargo or the like. A means 2 is used issuing a loading support tag 3 printed with the loading height calculated by the calculating means 1. The cargo delivered to the loading work area is sequentially loaded onto the loading space of the delivery vehicle using the loading height recorded on the issued loading support tag 3 as a measure.