To weld the damping alloy high in performance, capable of being produced at low cast, and provided with enough tensile strength, toughness and weldability.

This filler wire contains, by weight, 0.001-0.10% C, 0.1-3.5% Si, 0.1-3.5% Mn, ≤0.015 P+S, ≤0.30% Cu, 0.1-3.5% Ni, 0.1-4.0% Cr, 0.1-2.0% Mo, ≤0.0050% N, ≤0.0050% O and one or two kinds of 0.01-0.3% Al, 0.01-0.3 Ti, and further one or two or more kinds of 0.001-0.01% Nb, 0.0001-0.005 B, 0.01-0.5% Zr if necessary.