To provide a hydraulic shock absorber for semi-permanently reducing wide-range vibration including high frequency fine vibration while stably securing the ride comfort and driving stability of a vehicle without being influenced by temperature conditions or aging effects.

The hydraulic shock absorber 1 comprises a cylinder 4 filled with an operating fluid, a piston slidably arranged in the cylinder 4, and a piston rod 6 having one end connected to the piston and the other end protruded outward from an end plate 12 provided at one end of the cylinder 4. At least part of the shock absorber component is formed of a vibration damping alloy.