To automatically detect fraudulentness in the case of loading fraudulent products on a vehicle made up not to be recognized in a method of recognizing the vehicle using a non-contact ID card or a photoelectric tube to forward the products.

This product fraudulent loading prevention support system includes: an ID tag 15 where the information of every carrier vehicle is recorded; an ID information read/write means 16a for reading the information on the carrier vehicle 10 recorded on the ID tag; a vehicle metering device 12 for detecting the weight of the carrier vehicle 10; a product loading device 11 for loading the carrier vehicle 10 with products; and a control circuit 20 for controlling the product loading amount of the product loading device 11 on the basis of the metering value of the vehicle metering device 12 and detecting fraudulent loading in the product loading device 11 from a change in value of the vehicle metered by the vehicle metering device 12.