To provide a laser welding joint for double skin panels, in which underfill is prevented.

The laser welding joint 10 is formed in the ends in the width direction of a first face plate 101 and a second face plate 102 to be joined by laser welding or the like, by abutting the long double skin panels of an extrusion hollow material on each other in the width direction. A pair of joints 10A, 10B are constituted in the intersection of an end rib 105 and the first and second face plates. In the pair of joints, there are formed projected parts 11, an outer projection 13 and an inner projection 14 that are superimposed in the laser irradiation direction. Even if fitting in the width direction of the outer and inner projections 13, 14 is sufficient, there is a gap 16 in the width direction between the projected parts 11 of the pair of joints 10A, 10B. Even if fitting in the width direction of the outer and inner projections 13, 14 is insufficient, the outer and the inner projections 13, 14 have a superimposed part in the irradiation direction of the laser beam, in the laser welding joint 10 for the double skin panels.

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