In the bonding of the bush to the bar of the stabilizer, by surface pressure in the bonding surface (inner circumferential surface) of the hole part of the bush being made uniform, a necessary bonding strength can be obtained. The first arc part 101 is formed at the opposite side of the opening part of the U-shaped part 41 of the bracket 40 used in the bonding ( Fig. 3B ) and the second arc part 102 is formed in the opening part side, in the hole part 100A of the bush 100. The first arc part 101 and the second arc part 102 are the circular arc part being formed in the circular arc shape or approximately circular arc shape, for example, or are the ellipse arc part being formed in the ellipse arc shape or approximately ellipse arc shape, for example. In the hole part 100A, the center O1 of the first arc part 101 and the center 02 of the second arc part 102 are separated. The curvature radius r2 of the second arc part 102 is formed smaller than the curvature radius r1 of the first arc part 101. The hole part 100A is desirably formed in an oval shape as shown in Fig. 6 , for example.