Shock absorber

A shock absorber comprising:

• a cylindrical inner cylinder:
• a relative movement member inserted into an inside of the inner cylinder from one end of the inner cylinder in an axial direction and configured to generate a damping force by moving relative to the inner cylinder in the axial direction;
• a cylindrical outer cylinder having an opening and into which the inner cylinder is inserted and fixed;
• and
• a bracket including
• a pair of extension parts which extend outward in a radial direction of the outer cylinder from different positions spaced apart in a circumferential direction of the outer cylinder, each of the extension parts having a plurality of hole portions provided at a position facing an attachment hole of an attachment member disposed between the pair of extension parts, and
• a plurality of reduced-rigidity parts provided at a disposition positions between the plurality of hole portions and the outer cylinder at the same position as the hole portions in the axial direction of the outer cylinder so as to cover a whole length of the plurality of hole portions in the axial direction, and having a lower rigidity than a position different from the disposition position.