To provide a hydraulic buffer for a vehicle which does not worsen on-vehicle properties, and maintains desired damping characteristics against high frequency micro-vibration, by preventing wear and breakage of a dynamic damper due to jumping up of mud and pebbles.

A dynamic damper 8A consisting of an elastic member 8c and a mass member 8b is provided in the hydraulic buffer in a state of its being fixed on the outer periphery of a piston rod 3. The thickness in a radial direction and the length in an axial direction of the elastic member 8c are set as the dynamic damper 8A such that a resonant frequency in a longitudinal direction is lower than a resonant frequency in a radial direction.