Provided is a method for manufacturing a
metal lamination-shaped article in which
creep rupture strength satisfies a standard value in
Inconel (
registered trademark) 718 of a Ni-based
alloy. A method for manufacturing a
metal lamination-shaped article consisting of a Ni-based
alloy includes: a homogenizing treatment step (1) of performing a homogenizing treatment on a
metal lamination-shaped article consisting of the Ni-based
alloy containing 50% by
mass to 55% by
mass of Ni, 17% by
mass to 21% by mass of Cr, 2.8% by mass to 3.3% by mass of Mo, 4.75% by mass to 5.5% by mass of a total of Nb and Ta, 0.65% by mass to 1.15% by mass of Ti, 0.2% by mass to 0.8% by mass of Al, and the remainder consisting of Fe and inevitable impurities at 1,050°C or higher and 1,250°C or lower; a solutionizing treatment step (2) of performing a solutionizing treatment on the metal lamination-shaped article after the homogenizing treatment step (1); and an aging step (3) of performing an aging treatment at 650°C or higher and 720°C or lower after the solutionizing treatment step (2).