A metal roofing member for being arranged on a roof base together with other metal roofing members, the metal roofing member comprising: a front substrate made of a metal sheet, the front substrate comprising a body portion formed in a box shape; a back substrate arranged on a back side of the front substrate, the back substrate being configured to cover a cavity of the body portion; and a core material filling in the cavity between the body portion and the back substrate; wherein the body portion comprises: first side surfaces; and second side surfaces, each of the second side surfaces being adapted so as to be located on the ridge side of each of the first side surfaces when the metal roofing member is placed on the roof base, each of the second side surfaces being arranged at a position offset toward the outer side along a width direction of the body portion with respect to the first side surface; wherein each of the first side surfaces comprises a side flange extending from the lower end of the corresponding first side surface toward the outer side along the width direction, the side flange comprising a fold of the metal sheet directed toward the back side of the front substrate such that said fold wraps around the back substrate, said fold extending from the lower end of the first side surface toward the outer side along the width direction; wherein the side flange comprises a back end adapted to be in contact with the roof base; wherein a distance between the back end of the side flange and the back surface of the back substrate is 1 mm or more and 4 mm or less; wherein a protruding width of the side flange from the first side surface is equal to or less than a protruding width of the second side surface from the first side surface on the same side of the body portion along the width direction; and wherein the metal roofing member is configured to be arranged on the roof base while abutting at least the second side surface against a second side surface of an adjacent metal roofing member. a front substrate made of a metal sheet, the front substrate comprising a body portion formed in a box shape; a back substrate arranged on a back side of the front substrate, the back substrate being configured to cover a cavity of the body portion; and a core material filling in the cavity between the body portion and the back substrate; wherein the body portion comprises: first side surfaces; and second side surfaces, each of the second side surfaces being adapted so as to be located on the ridge side of each of the first side surfaces when the metal roofing member is placed on the roof base, each of the second side surfaces being arranged at a position offset toward the outer side along a width direction of the body portion with respect to the first side surface; wherein each of the first side surfaces comprises a side flange extending from the lower end of the corresponding first side surface toward the outer side along the width direction, the side flange comprising a fold of the metal sheet directed toward the back side of the front substrate such that said fold wraps around the back substrate, said fold extending from the lower end of the first side surface toward the outer side along the width direction; wherein the side flange comprises a back end adapted to be in contact with the roof base; wherein a distance between the back end of the side flange and the back surface of the back substrate is 1 mm or more and 4 mm or less; wherein a protruding width of the side flange from the first side surface is equal to or less than a protruding width of the second side surface from the first side surface on the same side of the body portion along the width direction; and wherein the metal roofing member is configured to be arranged on the roof base while abutting at least the second side surface against a second side surface of an adjacent metal roofing member.