SHOCK ABSORBER

A shock absorber includes a shock absorber main body composed of a vehicle-body side tube and a wheel side tube and formed with a lubrication clearance, a damper including a cylinder, a piston which partitions the interior of the cylinder into two working chambers, and a rod, a reservoir chamber composed of an air chamber and a working fluid chamber, a partition wall member for partitioning the working fluid chamber into an upper working fluid chamber and a lower working fluid chamber, a flow path having a check valve for permitting only a movement of the working fluid from the upper working fluid chamber to the lower working fluid chamber, and a communication path for allowing communication between the lower working fluid chamber and the lubrication clearance. A cross-sectional area of the lubrication clearance and that of the rod are different.