An inkjet cartridge packing mechanism having a cartridge storage box and a carrier fixer that uses the inside of a printer for storing an inkjet cartridge in order to save packing space of the printer. The packing mechanism further attaches the carrier of the printer to the carrier fixer and fixes a plurality of star wheels at the paper-feeding outlet by a flap connected to the carrier fixer, which can prevent movement of the carrier or dropping of the plurality of star wheels during transport. The saving of packing space by the packing mechanism can effectively reduce cost for transporting printers.