An anti-vibration device, comprising: an anti-vibration device main body comprising an inside attachment member coupled to a coupling member that is configured to extend towards an engine and to be coupled to the engine, an outside attachment member that is configured to be coupled to a vehicle body, and a resilient body that is disposed between the inside attachment member and the outside attachment member and that couples together the inside attachment member and the outside attachment member; and an anti-vibration device bracket that supports the anti-vibration device main body on a vehicle body, the bracket comprising a case that is configured to be coupled to the vehicle body, that houses the anti-vibration device main body and to which the outside attachment member is fixed, and that has an open portion that is open at a side portion on an opposite side to a coupling member extension side, and a displacement restriction portion that configures an upper portion or a lower portion of the case, that is formed with a through hole through which passes the inside attachment member that is coupled to the coupling member outside of the case, that is formed with a first displacement restriction face facing the coupling member at an outer side of the case, and that is formed with a second displacement restriction face facing a portion of the inside attachment member toward an inner side of the case, wherein the open portion of the case is formed with a flange portion that projects outward towards the outer side of the case, and the open portion of the case is formed such that a portion of the inside attachment member projects outward from the open portion as viewed along a main vibration input direction. an anti-vibration device main body comprising an inside attachment member coupled to a coupling member that is configured to extend towards an engine and to be coupled to the engine, an outside attachment member that is configured to be coupled to a vehicle body, and a resilient body that is disposed between the inside attachment member and the outside attachment member and that couples together the inside attachment member and the outside attachment member; and an anti-vibration device bracket that supports the anti-vibration device main body on a vehicle body, the bracket comprising a case that is configured to be coupled to the vehicle body, that houses the anti-vibration device main body and to which the outside attachment member is fixed, and that has an open portion that is open at a side portion on an opposite side to a coupling member extension side, and a displacement restriction portion that configures an upper portion or a lower portion of the case, that is formed with a through hole through which passes the inside attachment member that is coupled to the coupling member outside of the case, that is formed with a first displacement restriction face facing the coupling member at an outer side of the case, and that is formed with a second displacement restriction face facing a portion of the inside attachment member toward an inner side of the case, wherein the open portion of the case is formed with a flange portion that projects outward towards the outer side of the case, and the open portion of the case is formed such that a portion of the inside attachment member projects outward from the open portion as viewed along a main vibration input direction.