PROBLEM TO BE SOLVED: To effectively prevent collision when the thigh and the leg are placed in maximum extension, improving a walk feeling in extension and downsizing a shock absorber.;SOLUTION: In a hydraulic shock absorber 10 provided with an inner cylinder 22 erected on the bottom part in an outer cylinder 21, an orifice flow path 70 is provided so that it can communicate a piston side oil chamber 33B with a reservoir chamber 41 to a compression stroke and communicate a rod side oil chamber 33A with the reservoir chamber 41 at an extension stroke, in the axial direction of the inner cylinder 22.;COPYRIGHT: (C)2002,JPO
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