The thermoplastic resin composition according to the present invention comprises: approximately 100 parts by weight of base resins comprising approximately 10-45 wt% of a polyphenylene ether resin and approximately 55-90 wt% of an aliphatic polyamide resin; approximately 10-40 parts by weight of an inorganic filler; and approximately 2-10 parts by weight of a styrene-ethylene/butylene-styrene copolymer, wherein the weight ratio of the inorganic filler to the styrene-ethylene/butylene-styrene copolymer is approximately 3:1 to 8:1. The thermoplastic resin composition has excellent dimensional stability, exterior properties, shock resistance, rigidity, heat resistance, etc.