To provide a washer comprising two annular parts inner and outer and capable of being displaced in an axial direction without rotating the inner part relative to the outer part and being completely separated.

In the washer provided with a first support surface contacted with a nut; a second support surface coming into contact with an object; and a rotation resistance surface coming into contact with a bolt, the washer is made to an integral structure by connecting the inner part positioned at the inner side in a radial direction and the outer part positioned at the outer side in the radial direction by a joint element having flexibility in an axial direction.