To make it difficult to perform leakage or stealing on a transmission path, and to surely and easily confirm the person himself at low costs by performing the approval of transaction qualification in voice conversation and in a preliminary timing different from the actual transaction in a transaction processor for operating transaction processing to a terminal connected with a network.

This device is provided with a transaction qualification approving means 1-2 for judging the approval of transaction qualification to the origin of transmission based on voice information received by a voice information transmitting and receiving means, transaction qualification issuing means 1-3 for issuing transaction qualification approval information, and transaction qualification confirming means 1-4 for confirming the transaction qualification approval information when a transaction request is issued from a transaction terminal connected with a network, and stopping the transaction processing when it is unjust.