To provide a thermoplastic resin composition which has improved physical properties such as improved mechanical strengths, heat resistance, dimensional stability and electric characteristics.

This thermoplastic resin composition is characterized by comprising (a) 100 pts.wt. of a thermoplastic resin, (b) 50 to 300 pts. wt. of graphite having an average particle diameter of 1 to 100 μm, and (c) 20 to 300 pts.wt. of an inorganic filler [the total amount of (b) and (c) is ≤400]. As the inorganic filler (c), a fibrous, particulate or plate-like inorganic filler is used for improving various characteristics such as mechanical strengths, heat resistance, dimensional stability, and electric characteristics in response to a target.