PURPOSE: To selectively control rebound and jounce damping by fitting two load supporting members movably in a taking out and putting in style and providing a rebound damping assembly applying friction damping force from one of the respective load supporting members to the other.

CONSTITUTION: A strut is respectively provided with an outer and inner pipe shape load supporting members 10, 12 mutually movable in a taking out and putting in style. The inner end of one of the members 10 is applied with two kinds of frictional damping force on the exterior of the other member 12 in accordance with the telescopic motion of both members 10, 12 as supporting a bidirectional damping assembly 14. The inner end of the other member 12 is applied with frictional damping force on the interior of one of the members 10 in accordance with the telescopic motion of the both members 10, 12 as supporting a rebound damping assembly 16. In this case, the bidirectional damping assembly 14 is composed of upper and lower wedge rings 18, 20 and a damping and bearing assembly member 22. The rebound damping assembly 16 is composed of an inner wedge ring 38. A rebound carrier 38 is intervened between respective assemblies 14, 16.