A thermoplastic resin composition includes: a resin composite consisting of thermoplastic resins of (A) and (B) and nanoparticles having an average particle size larger than or equal to 1 nm and smaller than or equal to 1 μm and being locally unevenly distributed in the pattern of a curve or a straight line connecting consecutive points at a fracture surface of the resin composite at the observation for scanning electron microscope, wherein the thermoplastic resin (B) is a block copolymer including a block (B1) having compatibility with (A) and a block (B2) having no compatibility with (A).