An assembly comprising a mounting member and an abutment member , wherein the mounting member is for mounting a wall material to a structural body and comprises: a substrate portion that can be fixed to the structural body ; a wall portion that protrudes from one side edge of the substrate portion relative to the substrate portion ; a protruding portion that protrudes from another side edge side of the substrate portion to the same side as the wall portion , and that has a length of protrusion from the substrate portion shorter than a length of protrusion of the wall portion from the substrate portion ; a supporting portion that approaches the protruding portion by extending from a leading edge of the wall portion so as to be opposed to the substrate portion ; a first locking portion that protrudes from the supporting portion toward a side opposite to the substrate portion , and that is bent to the wall portion side; and a second locking portion that protrudes from the supporting portion toward the side opposite to the substrate portion , and that is bent to the protruding portion side, wherein the mounting member can be equipped with the abutment member , and wherein the abutment member includes a mounting portion that can be fixed onto the substrate portion and/or onto substantially the same plane as the substrate portion from the protruding portion side, an erect piece that is provided erecting in a direction intersecting the mounting portion , and that protrudes toward the side opposite to the substrate portion, and a clamping portion that is formed as a single piece with the mounting portion , and that is capable of clamping the protruding portion from a direction intersecting the substrate portion. a substrate portion that can be fixed to the structural body ; a wall portion that protrudes from one side edge of the substrate portion relative to the substrate portion ; a protruding portion that protrudes from another side edge side of the substrate portion to the same side as the wall portion , and that has a length of protrusion from the substrate portion shorter than a length of protrusion of the wall portion from the substrate portion ; a supporting portion that approaches the protruding portion by extending from a leading edge of the wall portion so as to be opposed to the substrate portion ; a first locking portion that protrudes from the supporting portion toward a side opposite to the substrate portion , and that is bent to the wall portion side; and a second locking portion that protrudes from the supporting portion toward the side opposite to the substrate portion , and that is bent to the protruding portion side, wherein the mounting member can be equipped with the abutment member , and wherein the abutment member includes a mounting portion that can be fixed onto the substrate portion and/or onto substantially the same plane as the substrate portion from the protruding portion side, an erect piece that is provided erecting in a direction intersecting the mounting portion , and that protrudes toward the side opposite to the substrate portion, and a clamping portion that is formed as a single piece with the mounting portion , and that is capable of clamping the protruding portion from a direction intersecting the substrate portion. <EOS>