To realize stable operation without high machining accuracy or assembly accuracy, and to reduce the cost in a hydraulic buffer having the position dependency in the compression side damping force.

In the hydraulic buffer 10, a communication passage 90 to communicate a piston side oil chamber 48A with a reservoir 73 is provided in bulkhead members 70 (71, 72), a control rod 91 to be fitted to the communication passage 90 after the piston rod 12 is compressed by a predetermined stroke is provided on the piston rod 12, and the control rod 91 is attached to the piston rod 12 via an elastic member (an 0-ring 92) movably in the radial direction.