To provide an air spring structure capable of sufficiently conducting attaching and detaching works with a simple structure.

A top plate 19 of an air spring 17 is fixed with respect to a side member. A piston 20 is supported by an air spring supporting bracket 23 at an accelerator side. An air bellows 21 is equipped with an upper opening 45 tightly installed on the top plate 19 and a lower opening 46 tightly installed on the piston 20, and forms an air chamber 37 with the top plate 19 and the piston 20. A bump stopper rubber 22 is supported by the top plate 19 in an inside of the upper opening 45 and protrudes downward. The bump stopper rubber 22 and the top plate 19 are fastened and fixed by an upper fastening bolt 55. The air spring supporting bracket 23 and the piston 20 are fastened and fixed by a lower fastening bolt 26. The lower fastening bolt 26 is positioned so that an axis thereof almost coincides with an extended line 56 of an axis of the upper fastening bolt 55.