LASER WELDING METHOD, WELDING STRUCTURE AND BUS BAR MODULE

The invention provides a laser welding method, a welding structure, and a bus bar module capable of suppressing poor welding of a joint portion formed by laser welding. A laser welding method in which a bus bar (2) and an intermediate member (6) are joined by irradiating the surface of the intermediate member with laser light in a state in which the bus bar (2) and the intermediate member (6) are overlapped, the laser welding method being provided with: a first welding step in which the surface (6a) of the intermediate member (6) is welded to the surface (6a) of the intermediate member (6) when viewed from a direction orthogonal to the surface (6a) of the intermediate member (6); forming a first weld line (11) by moving the laser beam (LB) in a C-shape from the weld start point (20) to the weld intermediate point (21); and a second welding step for forming a second welding line (12) continuous with the first welding line by moving the laser beam (LB) from the welding intermediate point (21) to a welding end p