Abstract: In a file transfer control among a plurality of computer systems, a plurality of data sets to be transferred are stored in a transaction file by executing transfer and receiving processings by use of control records. A plurality of data sets are stored in the transaction file together with information identifying transfer destinations. A transfer file contains control records each having ID information, and in a transfer operation, when a data set is moved from the transaction file to the transfer file, a store status in the transfer file is stored in a control record having ID information identical to ID information assigned to the data set. In response to a transfer execute instruction containing ID information, the pertinent data set is read for transmission by use of the control record.