The present invention provides a code reading device capable of associating various kinds of information with obtained data with ease simply by connecting the code reading device to a data holding device. A code reading device (1) includes a code reader (15) for reading code information, a memory (31), and a data processing control portion (32). The data processing control portion (32) stores code information read by the code reader in a code information storage area (311) of the memory (31), reads data from a data holding device when the data holding device is connected to the code reading device and stores the data in a data storage area (312) of the memory (31), and sends to a personal computer the data in the data storage area (312) in a state of being associated with the code information in the code information storage area (311) when the personal computer is connected to the code reading device.