PROBLEM TO BE SOLVED: To simplify a manufacturing process of a supporter.SOLUTION: A supporter 1 is formed in a cylindrical shape having a hollow part 2a in which gas can be accommodated, and includes a rubber tube 2 formed of an elastically deformable material that can accommodate gas in the hollow part 2a in a sealed state. The rubber tube 2 is formed annularly by the connection of one end 2b and the other end 2c of the rubber tube 2, and an expansion part 12 is formed in a part of the rubber tube 2, which expands so that the outer diameter is longer than the surrounding of the part by the gas in the hollow part 2a.SELECTED DRAWING: Figure 1
