An automatic transaction system has a cellular phone of a customer and an automatic teller machine (ATM) which can directly communicate with the cellular phone by infrared communication. When the customer performs a transaction by the ATM, transaction information such as transfer information registered in the cellular phone is directly inputted to the ATM and the ATM executes a transaction process by the transaction information which was directly received. When transaction data which is used in the transaction by the ATM is inputted once, transaction time in the ATM can be shortened by the simple operation.