A laser welding method for welding a plurality of metal members (21, 22) to each other by irradiating laser light onto a portion where the plurality of metal members have been superposed, in which at least one of the metal members from among the plurality of the metal members is formed from a metal-plated steel plate in which a base metal has been covered with a coating material that has a melting point below that of the base metal, comprising: irradiating laser light on one side surface of one of the metal members to form on the other side surface on the opposite side a protrusion projecting from the other side surface; superposing the one of the metal members having the protrusion on another of the metal members so that the protrusion is interposed therebetween; and irradiating laser light onto a portion where the plurality of metal members are superposed to weld the plurality of metal members to each other, characterized in that the protrusion is formed by: irradiating laser light on the one side surface to form on the other side surface a protruding portion projecting from the other side surface by scanning the laser light in a first direction; and generating a metal melt flow toward a top of the formed protruding portion by scanning laser light, starting from a starting end portion of the scanning of the laser light in the first direction, in a second direction opposite to the first direction while melting a part of the protruding portion so as to form the protrusion projecting farther from the other side surface than a height of the protruding portion. irradiating laser light on one side surface of one of the metal members to form on the other side surface on the opposite side a protrusion projecting from the other side surface; superposing the one of the metal members having the protrusion on another of the metal members so that the protrusion is interposed therebetween; and irradiating laser light onto a portion where the plurality of metal members are superposed to weld the plurality of metal members to each other, characterized in that the protrusion is formed by: irradiating laser light on the one side surface to form on the other side surface a protruding portion projecting from the other side surface by scanning the laser light in a first direction; and generating a metal melt flow toward a top of the formed protruding portion by scanning laser light, starting from a starting end portion of the scanning of the laser light in the first direction, in a second direction opposite to the first direction while melting a part of the protruding portion so as to form the protrusion projecting farther from the other side surface than a height of the protruding portion. irradiating laser light on the one side surface to form on the other side surface a protruding portion projecting from the other side surface by scanning the laser light in a first direction; and generating a metal melt flow toward a top of the formed protruding portion by scanning laser light, starting from a starting end portion of the scanning of the laser light in the first direction, in a second direction opposite to the first direction while melting a part of the protruding portion so as to form the protrusion projecting farther from the other side surface than a height of the protruding portion.