Shock absorber

A shock absorber comprising:

• a cylinder which is filled with a working fluid;
• a piston which is provided in the cylinder and divides the inside of the cylinder into two chambers;
• a piston rod in which one end side is connected to the piston, and the other end side extends to the outside of the cylinder;
• a first passage through which the working fluid flows out from one of the two chambers due to movement of the piston;
• a second passage which is provided in parallel with the first passage;
• a disk which is provided in the first passage and generates a damping force;
• a spool member, having a tubular shape, which is capable of changing a biasing force against the disk by moving in an axial direction;
• a pilot chamber which is provided in the second passage, located on an inner peripheral side of the spool member, and generates a biasing force against the disk in the spool member;
• and
• a closing member which blocks a flow of the working fluid from the pilot chamber to the other chamber out of the two chambers and is provided to be movable with respect to the spool member,
• wherein the closing member includes a sealing member being provided by a baked portion between the closing member and the spool member, and
• wherein the closing member is configured to bend such that the volume of the pilot chamber expands when the internal pressure of the pilot chamber increases.