Vibration isolation device and vibration isolation mechanism

A vibration isolation mechanism comprising:

• a first member;
• a second member;
• and
• a vibration isolation device disposed between the first member and the second member,
• wherein the vibration isolation device includes:
• a first support body fixed to the first member;
• a second support body fixed to the second member;
• and
• a resilient body that connects the first support body with the second support body,
• wherein the first support body includes:
• a first base portion having a circular shape and including a first fixing surface;
• a first shaft portion protruding from the first fixing surface along a central axis and inserted into a mounting hole of the first member,
• wherein the resilient body includes:
• a first side wall portion covering an outer peripheral surface of the first base portion;
• and
• a vibration isolator located between the first support body and the second support body, and
• wherein an outer wall surface of the first side wall portion includes a planar surface portion, wherein the planar surface portion comprises a plane in contact with a first rotation-restricting part for restricting rotation of the first support body about the central axis.