PROBLEM TO BE SOLVED: To provide Ni-base alloy weld metal capable of providing excellent tension ductility even when including hydrogen in large quantities in the weld metal.SOLUTION: Ni-base alloy weld metal on the present invention is weld metal containing C:0.01-0.05% (% means mass%, and so forth on a chemical composition), Si:0.01-1.0%, Mn:1.5-3.5%, Cr:0.5-5.0%, Mo:13.0-20.0%, W:1.0-4.0%, Fe:5.0-12.0%, B:0.0005-0.0050%, S:0.005% or less (including no 0%), P:0.005% or less (including no 0%), O:0.060% or less (including no 0%), and a residual part composed of Ni and an inevitable impurity, and the B concentration segregated in a crystal grain boundary in the weld metal is set as 20-200 ppm.SELECTED DRAWING: None
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