Shock absorber

Abstract

A shock absorber that includes a damping force generation mechanism including a damping valve provided in a first passage through which a working fluid flows out due to a movement of a piston and a back-pressure chamber applying an internal pressure to the damping valve in a valve closing direction; and a back-pressure chamber inflow passage introducing the working fluid from the first passage into the back-pressure chamber is provided. The damping valve has: a first valve that opens and closes an opening of the first passage of the piston and comes into contact with the piston; a second valve provided on a valve opening side of the first valve and having a diameter smaller than the first valve, and defines the back-pressure chamber such that a pilot valve that slidably and tightly fits a seal member having an outer circumferential portion into a cylindrical part of a pilot case.