To provide a link of aluminum with which the control design of buckling limit can be made easily.

A link has such a section shape that its oversurface 10-1 and undersurface 10-2 are connected by side faces 10-3 and 10-4 having bent parts. Owing to provision of these bends, the oversurface 10-1 and undersurface 10-2 make deformation so as to approach when a compression is applied to the link from its end parts, and the deformation is transmitted in the longitudinal direction.