The subject innovation relates to an insert-type ring bellows used in a muffler of a car. Ring-loading the bellows according to the present invention is composed of one each of the annular ring 20 in the pleats 11 of the bellows 10 of the single-layer insert is installed. Throughout the bellows 10 is the same as the shape of the conventional bellows, the annular ring 20 is installed to the inside, in addition to the shift of the corrugation portion 11 of the bellows 10 folds portion 11 of the bellows 10 over it is inserted is provided. Ring 20 according to the present invention is an elastic part 21 in one position at least is formed along the circumference, the elastic portion 21 consists of a groove 22 and the protrusion 23 and the spring 25 ring It is configured to (20) can be retracted or extended in the circumferential direction.; Accordingly, the bellows 10 according to the present invention because it can appropriately attenuate the torsional vibration by a ring (20, 30) inserted along the crease thereby improving the responsiveness of the twisting force. The ring insert-type bellows according to the present invention is to use it with a single, rubber bellows 10 is also advantageous in that manufacturing is easier than in the conventional bellows of the gyeopsik well.
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