Abstract: Provided is a thermoplastic resin composition capable of obtaining uniform electromagnetic absorption performance with no in-plane variation in a molded article thereof as a result of the fluidity being favorable in addition to the reflection loss and transmission loss being high. A thermoplastic resin composition according to the present disclosure which is to be used in an electromagnetic wave absorber and contains a thermoplastic resin (A) and carbon nanotubes (B), wherein the carbon nanotubes (B) satisfy formulas (1) and (2), and a sheet having a thickness of 100 ?m and formed from the thermoplastic resin composition has a sheet surface maximum height Sz of 5 ?m or less when measured according to ISO 25178. (1) The full width at half maximum of the diffraction peak of the (002) plane in powder X-ray diffraction analysis is 2.0-6.0°. (2) The G/D ratio is 0.5-2.0.