In a connecting fastener consisting of a plurality of fasteners connected through a connecting member of synthetic resin, the connecting member includes a ring-shaped portion attached to so as to encircle the shaft of each of the fasteners to be connected and a connecting portion connected to the ring-shaped portions encircling adjacent fasteners. When the fasteners each suffers from the blow at the time of driving by a fastener driving tool, the ring-shaped portions each has strength enough to be held over the shaft and the connecting portion has strength enough to be broken.