A anti-vibration device (1) includes a bracket (4) made of a synthetic resin and cylindrical metal fittings for fastening (5), where the bracket (4) and the metal fittings for fastening (5) are integrally formed. A vibration input position (P) is a position that does not coincide with a virtual line (L1) passing through central axes (O5) of a through holes (5h) of two metal fittings for fastening (5) in a planar view; the metal fitting for fastening (5) has a flange portion (51); and the flange portion 51 has a first outermost peripheral edge (51a) and a second outermost peripheral edge (51b), where a length (L51a) to the first outermost peripheral edge (51a) is longer than a length (L51b) to the second outermost peripheral edge (51b) based on the center axis (O5) of the through hole (5h).