Thermoplastic resin composition containing 18-80 weight % of a polyamide 6 resin with specific viscosity number and specific ratio of terminal carboxyl groups content to terminal amino groups content (component (A)); 5-25 weight % of a hydrogenated product of a block copolymer having a vinyl aromatic compound polymer block and a conjugated diene compound polymer block (component (B)); 3-15 weight % of a graft-modified hydrogenated product of such block copolymer (component (C)), said hydrogenated product being graft-modified with maleic anhydride in an amount of 2.6-5.0 weight % based on 100 weight % of said graft-modified hydrogenated product; 1-5 weight % conductive carbon black with specific BET specific surface area and specific DBP oil absorption (component (D)); 10-30 weight % talc having a specific average particle diameter (component (E)); 0.1-2 weight % of a phosphonite compound (component (F)); 0.5-5 weight % of an ethylene-vinyl alcohol resin (component (G)); 0-1 weight % of a pentaerythritol based phosphite (component (H)).