PURPOSE: To obtain a welded joint having high toughness with the ferritic stainless steel having high Cr content as an object.

CONSTITUTION: While a filler wire such as a power filler or a foil-like filler to satisfy the inequality I is supplied so that the quantity of Ni in weld metal to exceed 7weight%, laser beam welding is performed. Ni (weight%)-Creq≥24 (weight%) ... inequality I wherein Creq=%Cr+%Mo+1.5×%Si+0.5×%Nb (weight%). Accordingly, coarsening of crystal grains is prevented and a weld zone excellent in toughness can be obtained. Consequently, the rupture of the coil joining weld zone in line passing and subsequent lowering of productivity can be prevented.