Shock absorber

A shock absorber comprising:

• a cylinder in which a working fluid is sealed;
• a piston provided to be slidable in the cylinder and partitioning an inside of the cylinder into two chambers;
• a piston rod connected to the piston and extending to an outside of the cylinder;
• a passage through which a working fluid flows from the chamber on an upstream side to the chamber on a downstream side in the cylinder due to movement of the piston;
• a first damping force generation mechanism provided in the passage formed in the piston to generate a damping force;
• and
• a second damping force generation mechanism disposed separately from the first damping force generation mechanism and provided in the piston rod, wherein
• the second damping force generation mechanism includes:
• a valve seat member;
• a sub-valve provided in the valve seat member;
• and
• a cap member covering one end side of the second damping force generation mechanism and at least a part of an outer circumference of the valve seat member, and
• on one end side of the cap member,
• a communication passage which allows the inside and outside of the cap member to communicate is formed, and
• a biasing member provided so that one end surface side is in contact with an outer circumferential side of the cap member with respect to the communication passage, and a bendable flexible disc provided so that the other end surface of the biasing member is in contact therewith are disposed.