Resin composition for masterbatch

A resin composition, comprising:

• any one resin of polyacetal resins, ABS resins, polyamide resins, thermoplastic polyester resins, polyimide resins and polycarbonate resins;
• and
• 0.2 to 3 parts by mass of (a) a block copolymer or a hydrogenated product thereof, the block copolymer containing a polymer block having a structural unit derived from a vinyl aromatic compound as a main component and a polymer block having a structural unit derived from a conjugated diene compound as a main component;
• 0.08 to 3 parts by mass of (b) a polyolefinic resin;
• and
• 0.2 to 4.5 parts by mass of (c) an ethylene·α-olefin copolymer having characteristics (c1) to (c3) described below above,
• with respect to 100 parts by mass of the one resin of polyacetal resins, ABS resins, thermoplastic polyester resins, polyimide resins and polycarbonate resins,
• (c1) a kinematic viscosity at 100° C. is 10 to 5,000 mm2 s;
• (c2) a content of a structural unit derived from ethylene is in the range of 30 to 85 mol %;
• and
• (c3) a molecular weight distribution (Mw/Mn) for the molecular weight measured by gel permeation chromatography (GPC) with reference to polystyrene is not more than 2.5:
• wherein a content of the (b) component is 40 to 100 parts by mass and a content of the (c) component is 100 to 150 parts by mass with respect to 100 parts by mass of the (a) component.