An automotive crashworthiness energy absorption part for being provided at a front part or a rear part of an automotive body and absorbing crashworthiness energy by undergoing axial crush when receiving input of a crashworthiness load from a front or a rear of the automotive body, the automotive crashworthiness energy absorption part comprising: a tubular member configured to absorb crashworthiness energy by undergoing axial crush in a longitudinal direction of the tubular member and by repeatedly causing bellows-shaped buckling deformation on the tubular member, the tubular member including a top portion and side wall portions continuous with the top portion; and resin (9, 13, 27) coated or patched on first outer surfaces including at least outer surfaces of the top portion and the side wall portions of the tubular member, wherein the coated or patched resin (9, 13, 27) has a thickness of 8 mm or less after being heated, forms at least part of a peripheral wall portion of a closed cross section space, and is bonded to the first outer surfaces with an adhesive strength of 10 MPa or more; characterized in that the automotive crashworthiness energy absorption part further comprises: a separation prevention member that covers a surface of the resin (9, 13, 27) and is joined to second outer surfaces of the side wall portions in order to prevent the resin (9, 13, 27) from separating from the first outer surfaces, wherein the resin (9, 13, 27) is also bonded to the separation prevention member with an adhesive strength of 10 MPa or more; wherein the resin (9, 13, 27) is configured to be held inside a bending portion of the buckling deformation in the axial crush step. a tubular member configured to absorb crashworthiness energy by undergoing axial crush in a longitudinal direction of the tubular member and by repeatedly causing bellows-shaped buckling deformation on the tubular member, the tubular member including a top portion and side wall portions continuous with the top portion; and resin (9, 13, 27) coated or patched on first outer surfaces including at least outer surfaces of the top portion and the side wall portions of the tubular member, wherein the coated or patched resin (9, 13, 27) has a thickness of 8 mm or less after being heated, forms at least part of a peripheral wall portion of a closed cross section space, and is bonded to the first outer surfaces with an adhesive strength of 10 MPa or more; characterized in that the automotive crashworthiness energy absorption part further comprises: a separation prevention member that covers a surface of the resin (9, 13, 27) and is joined to second outer surfaces of the side wall portions in order to prevent the resin (9, 13, 27) from separating from the first outer surfaces, wherein the resin (9, 13, 27) is also bonded to the separation prevention member with an adhesive strength of 10 MPa or more; wherein the resin (9, 13, 27) is configured to be held inside a bending portion of the buckling deformation in the axial crush step. a separation prevention member that covers a surface of the resin (9, 13, 27) and is joined to second outer surfaces of the side wall portions in order to prevent the resin (9, 13, 27) from separating from the first outer surfaces, wherein the resin (9, 13, 27) is also bonded to the separation prevention member with an adhesive strength of 10 MPa or more; wherein the resin (9, 13, 27) is configured to be held inside a bending portion of the buckling deformation in the axial crush step.