Provided is a resin composition with which a resin molded article having excellent heat dissipation can be obtained. A resin composition containing: a thermoplastic resin; graphite; and a fibrous body, when the resin composition in a molten state is filled in a mold from a direction orthogonal to a thickness direction of a resulting resin molded article 1 and molded to obtain a resin molded article 1 of 100 mm in length×100 mm in width×2 mm in thickness, in a cross-section obtained by cutting the resin molded article 1 along a direction X parallel to a filling direction and a thickness direction Z, among regions 1A to 1E obtained by dividing the cross-section into five equal parts in the thickness direction Z, an average orientation angle (A) with respect to a plane direction of the graphite in at least one of the regions 1A and 1E on outermost layer sides being 15° or less, and an average orientation angle (B) with respect to the plane direction of the graphite in the central region 1C being 35° or more.