The present invention relates to a cartridge box comprising: —a box (1) comprising an intake (5) and an outlet (6), the outlet (6) being placed under the intake (5) and separated from same by a guide roller (3); —a plurality of compartments (9) separated by partitions (2); —a belt (7) of cartridges (8), said cartridge belt crossing the intake (5), then folding into the compartments (9), from the compartment (9) closest to the intake (5) to the compartment that is furthest away, and then crossing the outlet (6), above the guide roller (3).