To permit the discrimination as well as the confirmation of data in securities to be reissued easily and permit re-printing of the securities surely.

Upon printing the surface of a security, a security printing device 1 prints a security code for discriminating the securities respectively on the binding margin of the securities and stores the security code so as to be corresponding to the data on the surface of the security. Upon re-printing a security, in which a printing error is generated, the security code is utilized by the device as a key code when the data on the surface of the security is selected whereby the data of the security is selected surely and easily to re-print the security.