PURPOSE: To immediately weigh and attach a price label to a goods in the number of items over the maximum thereof registrable to one electronic balance by connecting a plurality of electronic balances with a printer to each other with an input/output bus line to transmit data of different goods registrated thereinto to other electronic balances.

CONSTITUTION: A plurality of electronic balances W1WW4 are connected with an input/output bus line L and data of goods such as the name, unit cost and tare thereof registrated thereinto are read out by a reading code to be set as a value attaching data. Then, the electronic balances are each equipped with a reading code setting key 9, a specified code setting key 10 for specifying the destination of transmission, a transmitting/receiving means 12 for transmitting codes and receiving data of goods from electronic balances as transmission destination and a response/reply means 13 for replying to electronic balances as transmittor. Thus, goods in the number of items more than the maximum thereof registrable into one electronic balance can be read out immediately without discrete registration of data of goods for respective electronic balances to attach a price label.