To detach a bent stock tube and set a stock tube to be bent next in a short time, and to enhance productivity and miniaturization of a bending device.
In a bending method of a stock tube 30 for bending a middle portion of one stock tube 30 at a plurality of points while both ends of the stock tube 30 are sealed with seal plugs 31 and 32, and the stock tube 30 is filled with liquid, one end part of the stock tube 30 is supported by a chuck part 51 of an extending/retracting chucking truck 50 on a bending machine 40 side, and the other end part of the stock tube 30 is placed on a supporting part 324 on the bending machine 40 side, and set thereto. The position of the set stock tube 30 is deviated from a bending part 41 of the bending machine 40.
TASHIRO YOJI
RACHI MAMORU
