An automobile hood, comprising: a panel, a reinforcing member, and a joint that joins together the panel and the reinforcing member, wherein: the reinforcing member includes a structure formed from a plurality of units having a hexagonal annular shape disposed in a close-packed arrangement; the unit has a floor, an inclined wall, and a top plate; the floor is adjacent to the panel; the top plate and the panel are separated from each other; the inclined wall is between the floor and the top plate; a hexagonal annular ridge line of the unit is between the floor and the inclined wall; the floor has an annular end part which is centered on a center of the annular unit; and the floor includes a floor surface as a face which faces the panel, characterised in that: all of the end part is between a first circle which is inscribed within the ridge line, and a second circle which is concentric with the first circle and which has a radius that is 60% of a radius of the first circle; and a width of the floor surface is 2 mm or more over an entire area of the annular end part in a circumferential direction of the annular end part. a panel, a reinforcing member, and a joint that joins together the panel and the reinforcing member, wherein: the reinforcing member includes a structure formed from a plurality of units having a hexagonal annular shape disposed in a close-packed arrangement; the unit has a floor, an inclined wall, and a top plate; the floor is adjacent to the panel; the top plate and the panel are separated from each other; the inclined wall is between the floor and the top plate; a hexagonal annular ridge line of the unit is between the floor and the inclined wall; the floor has an annular end part which is centered on a center of the annular unit; and the floor includes a floor surface as a face which faces the panel, characterised in that: all of the end part is between a first circle which is inscribed within the ridge line, and a second circle which is concentric with the first circle and which has a radius that is 60% of a radius of the first circle; and a width of the floor surface is 2 mm or more over an entire area of the annular end part in a circumferential direction of the annular end part. the reinforcing member includes a structure formed from a plurality of units having a hexagonal annular shape disposed in a close-packed arrangement; the unit has a floor, an inclined wall, and a top plate; the floor is adjacent to the panel; the top plate and the panel are separated from each other; the inclined wall is between the floor and the top plate; a hexagonal annular ridge line of the unit is between the floor and the inclined wall; the floor has an annular end part which is centered on a center of the annular unit; and the floor includes a floor surface as a face which faces the panel, characterised in that: all of the end part is between a first circle which is inscribed within the ridge line, and a second circle which is concentric with the first circle and which has a radius that is 60% of a radius of the first circle; and a width of the floor surface is 2 mm or more over an entire area of the annular end part in a circumferential direction of the annular end part. all of the end part is between a first circle which is inscribed within the ridge line, and a second circle which is concentric with the first circle and which has a radius that is 60% of a radius of the first circle; and a width of the floor surface is 2 mm or more over an entire area of the annular end part in a circumferential direction of the annular end part.