Thermoplastic resin composition

A thermoplastic resin composition comprising

• (i) a polyphenylene ether-based resin,
• (ii) a polyolefin resin and
• (iii) a hydrogenated block copolymer,
• wherein said hydrogenated block copolymer is a block copolymer comprising block A, block A comprising over 50 wt % of a vinyl aromatic compound component, and block B, block B comprising over 50 wt % of a conjugated diene compound component, the 1,2- and 3,4-vinyl content of a conjugated diene compound component of said copolymer being 60-90%, the content of a vinyl aromatic compound component being 30-70 wt % and at least 85% of the double bonds of said conjugated diene component are hydrogenated;
• a weight ratio ((i)/(ii)) of said (i) polyphenylene ether-based resin and (ii) said polyolefin resin is in the range of 95/5-5/95;
• and
• said (iii) hydrogenated block copolymer is present in the range of 1-50 parts by weight to 100 parts by weight of the total weight of said (i) polyphenylene ether-based resin and said (ii) polyolefin resin,
• wherein the structure of the (iii) hydrogenated block copolymer is represented by A1-B-A2 or A1-B-A2-B, wherein A1 and A2 are each block A of said vinyl aromatic compounds component with different structures, and
• the weight-average molecular weight of A1 is 15,000 or more and the ratio of the weight average molecular weight of A2 to the weight average molecular weight of A1 (A2/A1) is 0.9 or less.