The resin composition for plating of the present invention includes: a graft copolymer (A) in which a monomer component (a) including specific amounts of an aromatic vinyl compound (a1), a vinyl cyanide compound (a2), and another vinyl compound (a3) is graft-polymerized on a rubbery polymer; and a polycarbonate resin (P), wherein an amount of resin (P) is 40 to 70% by mass, based on a total mass of the resin composition, a rubber content (X) in copolymer (A) is more than 40% by mass, based on a total mass of copolymer (A), a graft ratio (Y) of copolymer (A) satisfies formula (1): 793e−0.041X≥Y≥515e−0.041X (1), and a rubber content (Z) in the resin composition is 10 to 18% by mass, based on a total mass of the resin composition.