To provide an elongation side damping force of proportional characteristic with a simple structure in a front fork.

In the front fork 10, a first oil hole 51 facing a working oil chamber 31 even under a most extended condition of the front fork 10 is bored on a tube wall of an inner tube 12, and a second oil hole 52 facing an oil reservoir chamber 32 even under a most compressed condition of the front fork 10 is bored on the tube surface of the inner tube 12, and communication between the first oil hole 51 and the second oil hole 52 is maintained by an annular gap 53 between an outer tube 11 and the inner tube 12.