An object of the present invention is to provide a cartridge memory read/write device which can write data signals in plural kinds of cartridge memories. The cartridge memory read/write device is used in a production line on which the plural kinds of cartridge memories flow, and is characterized by being equipped with plural kinds of read/write units reading and writing data signals corresponding to respective kinds of plural kinds of cartridge memories and a control unit selecting a read/write unit corresponding to kinds of cartridge memories which flow on the production line out of the plural kinds of read/write units.