An anti-vibration device includes first reflective members, second reflective members, barrels, a first link member, and a second link member. The barrels each hold the first reflective member and the second reflective member. The first link member connects the pair of left and right barrels with each other, and rotates the barrels. The second link member engages with the pair of left and right second reflective members, and rotates the second reflective members. In a case where the barrel is viewed in a direction parallel to a second rotational axis, at least a part of the first link member and the second link member is disposed in a triangle region on a rear side of the second reflective member.