Anti-vibration rubber

An anti-vibration rubber, comprising:

• a collar member that is cylindrical, the collar member including a through-hole;
• a rubber member to be fitted onto an outer periphery of the collar member, the rubber member including a fitting hole formed therein;
• and
• an outer member fitted onto an outer periphery of the rubber member, wherein
• the collar member includes a plurality of collar protrusions and a plurality of collar recesses alternately arranged around an axis of the through-hole, the plurality of collar protrusions protruding outward as viewed in an axial direction of the through-hole, each of the plurality of collar recesses being formed between two of the plurality of collar protrusions,
• the rubber member includes rubber recesses and rubber protrusions formed on an inner surface of the fitting hole,
• each of the plurality of collar protrusions is fitted into a corresponding one of the rubber recesses, and each of the plurality of the collar recesses is fitted onto a corresponding one of the rubber protrusions so that the rubber member is in close contact with and fitted onto the outer periphery of the collar member, and
• a slit is formed on an outer peripheral side of each of the rubber recesses in the rubber member.