PURPOSE: To improve serviceability by automatically giving a message for requesting standby to a customer at the time of making the customer who completes self-scanning registration wait.

CONSTITUTION: When the customer 6a of one lane 7a normally completes scanning registration and closes a registration completion switch 13 earlier, a registration completion message is displayed at the dot display part of an approval part 2a. At the time, since an opposite lane registration completion flag is set to '1' in the approval part 2b, when the other customer 6b completes the scanning registration of all the purchased merchandise and closes the registration completion switch 13, a standby request message is displayed at the dot display part of a display device 23 for the customer. Thus, the other customer 6b recognizes that a casher 27 is under a registration closing job for the customer 6a in the opposite lane 7a and the standby is required to be performed from the contents of the message displayed at the display device 23 for the customer.