Elastic support member, and suspension device

An elastic support member configured to be interposed between a spring and a spring support member configured to support an end of the spring, the elastic support member comprising:

• a protrusion protruding from an opposing surface of the elastic support member facing the spring support member, the protrusion being configured to be inserted into a through-hole formed in the spring support member, wherein
• the protrusion comprises:
• a base sized, in a direction parallel to the opposing surface, to be smaller than a size of the through-hole and configured to be fitted in the through-hole;
• and
• a lug protruding outward from an outer periphery of the base, the lug being located opposite the opposing surface with respect to the spring support member when the base is fitted in the through-hole, and
• the lug comprises a recess between the lug and the base, the recess being depressed away from the opposing surface.