A wire straightening device, to be included in a wire processing device, for straightening a curl of a wire that is fed onto a straight feed path, the wire straightening device comprising: a plurality of first straightening rollers arranged along the feed path; a plurality of second straightening rollers arranged along the feed path and arranged on an opposite side of the feed path from the first straightening rollers; a first support member that supports the first straightening rollers; a second support member that supports the second straightening rollers; an actuator that moves the first support member in a direction such that the first straightening rollers move closer to the second straightening rollers and in a direction such that the first straightening rollers move away from the second straightening roller; a preset value obtaining device that obtains a preset value of roller spacing, representing spacing between the first straightening rollers and the second straightening rollers, which is predetermined for each type of wire; a roller spacing automatic setting device that drives the actuator so that the roller spacing becomes equal to the preset value in accordance with the type of the wire, when the type of the wire is input; and a roller spacing changing device that changes the roller spacing based on an operation by an operator while retaining the preset value during operation of the wire processing device, characterized in that the roller spacing changing device includes a computer including a correction value setting section that sets a correction value of the roller spacing based on an operation by the operator, and a drive control section that drives the actuator so that the roller spacing becomes equal to a value that is obtained by adding the correction value to the preset value. a plurality of first straightening rollers arranged along the feed path; a plurality of second straightening rollers arranged along the feed path and arranged on an opposite side of the feed path from the first straightening rollers; a first support member that supports the first straightening rollers; a second support member that supports the second straightening rollers; an actuator that moves the first support member in a direction such that the first straightening rollers move closer to the second straightening rollers and in a direction such that the first straightening rollers move away from the second straightening roller; a preset value obtaining device that obtains a preset value of roller spacing, representing spacing between the first straightening rollers and the second straightening rollers, which is predetermined for each type of wire; a roller spacing automatic setting device that drives the actuator so that the roller spacing becomes equal to the preset value in accordance with the type of the wire, when the type of the wire is input; and a roller spacing changing device that changes the roller spacing based on an operation by an operator while retaining the preset value during operation of the wire processing device, characterized in that the roller spacing changing device includes a computer including a correction value setting section that sets a correction value of the roller spacing based on an operation by the operator, and a drive control section that drives the actuator so that the roller spacing becomes equal to a value that is obtained by adding the correction value to the preset value.