In a front fork (10), a bolt (90) that is clamped into an axle rack (14) from the outside is fastened in a base (80) that is connected, along the axial direction, with the lower end portion of an axle pipe (12) under the temporarily fixed state. The axial pipe (12) is drawn towards the axle rack (14). In this way, under the state where the top end face (A) of the lower end portion of the axle pipe (12) is not connected with the bottom surface (B) of a concave portion (15) of the axle rack (14), the assembling state is formed where surface pressure is generated on a contact part of two thread surfaces of a male thread part (71) of the axle pipe (12) and a female thread part (72) of the axle rack (14).