An automobile structural member being a hollow automobile structural member having: a top wall part; a bottom wall part facing the top wall part; and a pair of heightwise wall parts that connect to the top wall part and the bottom wall part, the automobile structural member comprising two first corrugated reinforcing members being inside the automobile structural member, wherein: a bottom portion and a top portion of one of the first corrugated reinforcing members extend in a direction from the top wall part toward the bottom wall part; the bottom portion of the one of the first corrugated reinforcing members is joined to an inner surface of the heightwise wall part of either of a pair of the heightwise wall parts, and a bottom portion of the other of the first corrugated reinforcing members is joined to the heightwise wall part facing the heightwise wall part to which the one of the first corrugated reinforcing members is joined, inside the automobile structural member, wherein: the two first corrugated reinforcing members are not in contact with each other; and in each of the two first corrugated reinforcing members, a distance between a plane formed by a plurality of bottom portions and a plane formed by a plurality of top portions is 8 to 40% of a distance between the two heightwise wall parts of the automobile structural member, and in each of the two first corrugated reinforcing members, a cross-sectional shape perpendicular to the direction from the top wall part toward the bottom wall part is substantially the same in the direction from the top wall part toward the bottom wall part. a bottom portion and a top portion of one of the first corrugated reinforcing members extend in a direction from the top wall part toward the bottom wall part; the bottom portion of the one of the first corrugated reinforcing members is joined to an inner surface of the heightwise wall part of either of a pair of the heightwise wall parts, and a bottom portion of the other of the first corrugated reinforcing members is joined to the heightwise wall part facing the heightwise wall part to which the one of the first corrugated reinforcing members is joined, inside the automobile structural member, wherein: the two first corrugated reinforcing members are not in contact with each other; and in each of the two first corrugated reinforcing members, a distance between a plane formed by a plurality of bottom portions and a plane formed by a plurality of top portions is 8 to 40% of a distance between the two heightwise wall parts of the automobile structural member, and in each of the two first corrugated reinforcing members, a cross-sectional shape perpendicular to the direction from the top wall part toward the bottom wall part is substantially the same in the direction from the top wall part toward the bottom wall part. the two first corrugated reinforcing members are not in contact with each other; and in each of the two first corrugated reinforcing members, a distance between a plane formed by a plurality of bottom portions and a plane formed by a plurality of top portions is 8 to 40% of a distance between the two heightwise wall parts of the automobile structural member, and in each of the two first corrugated reinforcing members, a cross-sectional shape perpendicular to the direction from the top wall part toward the bottom wall part is substantially the same in the direction from the top wall part toward the bottom wall part.