To avoid running incapability of a vehicle when a resin bearing breaks in a strut damper.

In the strut damper 10, the resin bearing 40 has bearing parts 51 disposed around a piston rod 12, and spring bearing parts 52 disposed around the bearing part 51 to support a suspension spring 13, and a bearing holding plate 32 is provided so as to cover an upper part of the resin bearing 40, and in the resin bearing 40, a projection 52A projecting to a side of the bearing holding plate 32 is provided on an upper face of the spring bearing part 52, and the projection 52A of the upper face of the spring bearing 52 separated away from the bearing part 51 due to breaking is abutted on a lower face of the bearing holding plate 32 to carry out supporting.