A point of sale (POS) terminal (a code reading device) according to one embodiment of the present invention is provided with: a code reading unit which reads code information on the basis of light reflected from a code attached to a product; and a discount processing unit which adds, to the product, a discount associated with a second light different to a first light, if the code information cannot be read when the code is irradiated with the first light, but can be read when the code is irradiated with the second light.