An intake manifold, comprising:
- a base member and a cover member, respectively made of resin and extending along an intake passage, the base member and the cover member facing each other in the radical direction of the intake passage;
- and
- a flame damper having a flame suppression structure, the flame damper incorporated in a one end side portion of the base member so as to be positioned on the intake passage, wherein
- the one end side of the base member includes a recessed body portion having a substantially split cylindrical shape and a fitting holding portion integrally formed with the recessed body portion to hold the flame damper by fitting the flame damper in the axial direction so as to be able to abut against the fitting holding portion,
- the fitting holding portion includes an abutment surface against which the flame damper is able to abut from the side of the recessed body portion, and a fitting inner peripheral wall surface that surrounds and fits the flame damper therein,
- the flame damper is constituted by the flame suppression structure, an outer cylindrical body that surrounds the outer periphery of the flame suppression structure and an elastic holder member that covers an outer peripheral surface and both end surfaces of the outer cylindrical body,
- the elastic holder member includes an outer peripheral fitting portion held in close contact with the outer peripheral surface of the outer cylindrical body and fitted to the fitting holding portion, and the outer peripheral fitting portion includes a cylindrical wall portion held in close contact with the outer peripheral surface of the outer cylindrical body, and a plurality of annular lip portions respectively protruding from an outer peripheral surface of the cylindrical wall portion to the outside in the radial direction and one side in the axial direction of the cylindrical wall portion while being spaced apart from each other in the axial direction, and
- wherein the elastic holder member has an abutment portion on one side and an abutment portion on the other side integrally provided with the outer peripheral fitting portion,
- wherein the abutment portion on one side is abutting and engaging with the abutment surface having an annular plate-shape of the fitting holding potion while surrounding an opening on an end side of the flame suppression structure, and
- wherein the abutment portion on the other side is pressed in a retaining direction by a retaining and rectifying member while surrounding an opening on the other side of the flame suppression structure, and
- wherein the elastic holder member is made of a rubber material.