To provide a vibration damping structure and the like at a bolt junction part capable in which a viscoelastic body and the like can conduct effective vibration damping action as well as vibration damping deformation action both in a compression process by tension of a bolt and in a recovery process after compression.

A disk spring 6 is provided between a bolt head part 3a and a member 1 with a bolt 3 inserted in a center bolt through hole 6a and the viscoelastic body 8 is provided along a recessed part surface in a conical recessed part 6b of the disk spring 6. Preferably, a flat washer 7 is desirably provided adjoining a wide-mouth side of the disk spring 6 and further the wide-mouth side of the disk spring 6 is desirably in slidable touch with the flat washer 7.