Electronic cash register with special sales information management

A purpose of this invention is to totalize, store, and check special sales information concerning special customers or special purchasers, etc. in an easy and simple manner. Usually, sales information of registered merchandise is totalized and stored in an area corresponding to a department code (41) of a department file table (39) specified in a product department (47), by an ordinary registration mode. When special registration process is specified by depressing a department shift key, a value of the product department (47) is changed to a value specified in a department shift table by a special registration mode and the sales information is totalized and stored in an area corresponding to the department code (41) of the department file table (39) specified by the thus changed value. Accordingly, the special sales information can be totalized as easily and simply as ordinary sales information, and can be stored separately from the ordinary sales information.