Austenitic stainless steel welded joint and austenitic stainless steel welding material

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An austenitic stainless steel welded joint, whose base metal and weld metal each comprises, by mass percent, C : not more than 0.3%, Si : not more than 2%, Mn : 0.01 to 3.0%, P : more than 0.04% to not more than 0.3%, S : not more than 0.03%, Cr : 12 to 30%, Ni : 6 to 55%, rare earth metal(s) : more than 0.2% to not more than 0.6%, sol. Al : 0.001 to 3% and N : not more than 0.3%, with the balance being Fe and impurities, and satisfies the formula of (Cr+1.5×Si+2×P)/(Ni+0.31×Mn+22×C+14.2×N+5×P)<1.388, in spite of having a high P content and showing the fully austenitic solidification, has excellent resistance to the weld solidification cracking. Therefore, the said austenitic stainless steel welded joint can be widely used in such fields where a welding fabrication is required. Each element symbol in the above formula represents the content by mass percent of the element concerned.